Azura Genomics

Proteinase K

<h2>What Is Proteinase K?</h2>
&nbsp;
Proteinase K is a subtilisin-related serine endopeptidase with a molecular weight of 28,930 daltons (28.9 kDa), first isolated from Tritirachium album Limber in 1974, and named for its ability to digest keratin ('K') as its original substrate. The enzyme cleaves peptide bonds at the carboxylic side of aliphatic, aromatic, and basic amino acid residues, making it effective against nearly all protein substrates, including histones, chromatin-bound proteins, cell membrane proteins, and contaminating nucleases (DNases, RNases). Critically, Proteinase K retains full activity in the presence of 1% SDS, 4 M urea, 1% Triton X-100, 0.5% N-lauroylsarcosine, EDTA at 5 mM, and common reducing agents -- conditions under which most other proteases are inactivated. Use Proteinase K in any protocol requiring enzymatic removal of proteins from nucleic acid preparations, including genomic DNA, total RNA, plasmid, phage, and cfDNA extraction from tissues, blood, FFPE samples, bacteria, yeast, and environmental samples.
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<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Proteinase K (Lyophilized): A stable, high-purity powder ideal for prolonged storage and tailored buffer preparation.
</li>
<li dir="ltr" aria-level="1">
Proteinase K Solution: A prepared, stable liquid that reduces preparation time and minimizes pipetting mistakes.
</li>
<li dir="ltr" aria-level="1">
Proteinase K (G029): A specially refined grade designed for the swift inactivation of RNases and DNases in sensitive procedures.
</li>
</ul>
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<h2>How to Choose Proteinase K</h2>
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Solution vs. lyophilized
Proteinase K is supplied as lyophilized powder (commonly at 30 mAnson units/mg or 20 mg/mL equivalent activity) or as a ready-to-use solution (typically 20 mg/mL in storage buffer). Lyophilized powder offers longer shelf life (up to 2 years at -20 degrees C), cost efficiency for high-volume users, and flexibility in buffer preparation. Solutions are convenient for low-volume use and eliminate weighing errors. Both formats deliver equivalent specific activity when the lot certificate is checked.
Molecular biology grade vs. standard
Molecular biology grade Proteinase K is certified free of detectable endonuclease, exonuclease, DNase, and RNase activities by stringent lot-release assays. Standard grades may carry trace nuclease activity that degrades DNA or RNA during digestion. For any application where nucleic acid integrity matters -- DNA sequencing, NGS library prep, RT-PCR, FISH, or southern blotting -- use only molecular biology grade or equivalent.
Recombinant vs. native
Recombinant Proteinase K (expressed in Pichia pastoris or E. coli) offers freedom from animal-derived material, greater lot-to-lot consistency, and suitability for regulated or GMP-adjacent workflows. Native Proteinase K (isolated from T. album culture) is standard for most research applications. Both must carry DNase/RNase-free certification for nucleic acid use.
Concentration and unit dose
Standard working concentrations are 50-200 microgram/mL for most DNA/RNA extraction protocols in lysis buffer. Higher concentrations of 1-5 mg/mL are used for FFPE tissue deparaffinization and protein digestion, and for prion inactivation studies (where Proteinase K at 10-50 microgram/mL is used to assess proteinase K-resistant PrP accumulation). Proteinase K retains activity for up to 24 months when stored at -20 degrees C in aliquots.
Temperature and pH optimization
Optimal activity is at 20-60 degrees C and pH 7.5-12.0; activity at pH 8.0 and 55 degrees C is used in most nucleic acid extraction protocols. Activity at 37 degrees C is approximately 80% of the 55-60 degrees C optimum. Calcium ions (1 mM Ca2+) stabilize the enzyme structure; EDTA removes calcium and reduces activity, though the enzyme retains sufficient function for nucleic acid prep protocols. Heat-inactivation above 95 degrees C for 5 minutes is complete and does not require chemical inhibitors.
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<h2>Specifications Context</h2>
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Proteinase K specific activity is commonly reported in Anson units (mAnson units/mg): one mAnson unit releases 1 micromol of tyrosine equivalents per minute from hemoglobin at pH 7.5 and 35.5 degrees C. Proteinase K is fully denatured at 95 degrees C in 5 minutes without requiring PMSF or other chemical inhibitors, making heat inactivation the simplest and most reliable option before downstream enzymatic steps such as PCR or reverse transcription. The enzyme is deactivated above 95 degrees C within the first cycle of PCR thermocycling, preventing interference with polymerase activity in protocols that include Proteinase K in the PCR reaction. Proteinase K is a universal reagent in automated nucleic acid extraction platforms, including MagNA Pure, KingFisher, and Hamilton NGS workstations; solution-format Proteinase K is specified in most automated platform kits.&nbsp;
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Simplify your laboratory tasks&mdash;<a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> now for a price estimate on our top-tier Proteinase K products.

User Manual

Proteinase K Solution

AZ-3201 Proteinase K Solution by Azura Genomics is a ready-to-use 20 mg/ml recombinant serine protease (≥800 U/ml), molecular biology grade, free of nucleases, active at up to 56°C and in urea/SDS. 5 ml, stored at −20°C.

Manufacturer

Proteinase K Solution, 20 mg/mL, 5 mL

Proteinase K Solution, 20 mg/mL, 25 mL

Proteinase K Solution, 20 mg/mL, 100 mL

dNTPs Mix

<h2 dir="ltr"> What is a dNTP Mix?</h2>
 A dNTP Mix is a premixed solution containing all four deoxynucleotide triphosphates - dATP, dCTP, dGTP, and dTTP - combined in equimolar amounts at a standard working concentration, commonly 10 mM each (40 mM total) when prepared from 100 mM individual stocks. The premix is ready for direct addition to a PCR, qPCR, or cDNA synthesis reaction without further dilution or balancing.&nbsp; Choose a premixed dNTP Mix for routine PCR setup where convenience and lot-to-lot consistency outweigh the need for custom nucleotide ratios.
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<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li>High-purity nucleotide mixes for PCR and DNA synthesis applications, including PureStrand&trade; Ultra-Pure dNTP Mix (Azura)</li>
<li>Standard 10 mM each dNTP formulations suitable for routine PCR workflows, including dNTP Mix (10 mM each) formats</li>
<li>Higher-concentration nucleotide solutions, such as Accuris 40 mM dNTP Mix for optimized reaction setup flexibility</li>
<li>Ready-to-use balanced dNTP blends supporting DNA polymerase activity in PCR and related enzymatic amplification reactions</li>
<li>Nucleotide triphosphate formulations, including NTP Mix (G945), for broader enzymatic and molecular biology applications</li>
</ul>
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<h2>How to Choose a dNTP Mix</h2>
 Concentration Format Common premix formats include 10 mM each (40 mM total, a 50x working stock relative to the 0.2 mM final concentration) and 2.5 mM each (10 mM total, a 10x working stock). Select the format that aligns with your typical reaction volume and pipetting precision - more dilute stocks reduce pipetting error for small-volume reactions. Equimolar Accuracy Because all four nucleotides are pre-combined at equal concentrations, a premixed dNTP Mix removes the risk of manual equimolar-mixing error that can occur when combining four separate 100 mM stocks - unbalanced ratios increase misincorporation frequency during polymerisation. Throughput Considerations For high-throughput PCR setups across multi-well plates, a premixed dNTP Mix reduces the number of individual pipetting steps per reaction compared to adding four separate dNTP stocks, improving both speed and reproducibility. Compatibility with Master Mixes Many 2x PCR master mixes already include dNTPs at optimised concentrations - a separate dNTP Mix is primarily needed for labs assembling reactions from individual components (enzyme, buffer, dNTPs, primers) rather than using a pre-formulated master mix. Application Range A standard equimolar dNTP Mix supports PCR, qPCR, and cDNA synthesis (as substrate for reverse transcriptase). Confirm the concentration and purity grade align with the specific requirements of high-fidelity or long-range PCR, if applicable. 
<h2 dir="ltr"> Specifications Context</h2>
 To prepare a standard PCR reaction at the recommended 0.2 mM final concentration of each dNTP using a 10 mM-each premix, 1 &micro;L of the premix is added per 50 &micro;L reaction. Equal nucleotide concentrations in the premix are essential because unbalanced dNTP ratios increase the frequency of misincorporation during DNA synthesis - a factory-balanced premix removes this variable. dNTP Mix is typically supplied in water at pH 7.5, stable at &minus;20 &deg;C with documented multiple freeze-thaw tolerance; thawing and mixing thoroughly before use is recommended, especially for higher-concentration formats. 
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<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at MBP today and get high-purity dNTP mixes tailored for your laboratory workflows.

MSDS

PureStrand™ Ultra-Pure dNTPs mix

PureStrand Ultra-Pure dNTPs Mix (AZ-1261) by Azura Genomics — 40 mM ready-to-use mix (10 mM each dATP/dCTP/dGTP/dTTP), 0.5 ml, &gt;99% triphosphate purity by HPLC. DNase/RNase/Nickase/Protease-free. ~400 reactions per tube. 24-month shelf life at −20°C. For PCR, qPCR, and cDNA synthesis.

PureStrand 40mM dNTP Mix 0.5ml

PureStrand 40mM dNTP Mix 4 x 0.5 ml

dNTP Set

<h2 dir="ltr">What is a dNTP Set?</h2>
 A dNTP Set is a complete set of individual, highly pure deoxynucleotide triphosphates - dATP, dCTP, dGTP, and dTTP - each supplied as a separate 100 mM solution in water. Each nucleotide can be diluted and mixed with any of the other three to the desired final concentration or ratio, giving researchers full control over custom PCR, qPCR, or labelling mix preparation. Choose a dNTP Set when you need to prepare custom-concentration mixes, run multiple applications with different nucleotide requirements, or want individual stocks for non-equimolar formulations.
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<h2 dir="ltr">What you will find:</h2>
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<ul>
<li style="color: #000000;" data-section-id="rmv9gj" data-start="173" data-end="310">Pre-mixed deoxynucleotide triphosphate (dNTP) sets for PCR and DNA synthesis applications, including PureStrand&trade; dNTP Set (Azura)</li>
<li style="color: #000000;" data-section-id="1u2l5t9" data-start="311" data-end="437">High-concentration nucleotide formulations such as Accuris 100mM dNTP Set for flexible reaction setup and optimization</li>
<li style="color: #000000;" data-section-id="kkyf1s" data-start="438" data-end="533">Standard dNTP set formats suitable for routine PCR workflows, including dNTP Set (G050)</li>
<li style="color: #000000;" data-section-id="1j5qt5c" data-start="534" data-end="653">Nucleotide triphosphate formulations for enzymatic and molecular biology applications, including NTP Set (G946)</li>
<li style="color: #000000;" data-section-id="1nhlqes" data-start="654" data-end="773">Ready-to-use balanced nucleotide sets supporting DNA polymerase activity in PCR and related amplification reactions</li>
</ul>
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<h2 dir="ltr">How to Choose a dNTP Set</h2>
 Custom Mix Preparation A dNTP Set's primary advantage is flexibility - preparing a working mix at any desired total concentration and ratio, including non-standard formulations for specific applications such as nucleotide analog substitution (e.g., dUTP in place of dTTP for anti-carryover-contamination strategies). Multiple Application Support Labs running PCR, qPCR, cDNA synthesis, and DNA labelling from the same stock benefit from a single dNTP Set, since each application may call for slightly different concentrations or ratios prepared from the same individual 100 mM tubes. Stock Concentration 100 mM is the standard individual stock concentration for dNTP Sets, providing substantial dilution headroom - a 100 mM stock can be diluted 1000-fold to reach a 0.1 mM working concentration, or combined at lower dilution ratios for higher-concentration premixes. Equimolar Mixing Discipline When preparing a standard equimolar mix from a dNTP Set, equal volumes of each 100 mM nucleotide are combined with water to the desired total concentration - for example, equal-volume mixing of all four 100 mM stocks yields a 25 mM-each premix at 100 mM total. Purity and Lot Testing PCR-grade dNTP Sets are typically tested at greater than 99% purity by HPLC, with concentration verified by optical density spectrometry and absence of human/E. coli DNA confirmed by qPCR - important documentation for labs requiring lot-specific quality records. 
<h2 dir="ltr"> Specifications Context</h2>
 To prepare a standard equimolar working mix from a dNTP Set, combining equal volumes of each 100 mM individual stock yields a mix at 25 mM of each nucleotide (100 mM total); this can be further diluted to common working stocks such as 10 mM each (a 50x stock relative to the 0.2 mM PCR final concentration) or 2.5 mM each (a 10x stock). The performance of each lot is typically functionally tested in a PCR requiring all four nucleotides, with concentration verified by optical density spectrometry and purity confirmed by HPLC. dNTP Sets are stable at &minus;20 &deg;C with documented multiple freeze-thaw tolerance; thawing and mixing each individual tube thoroughly before use is recommended. 
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<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at MBP today and get reliable dNTP sets for your next successful experiment.

PureStrand™ dNTP Set

AZ-1271 by Azura Genomics is a set of four individual 100 mM dNTP solutions (dATP, dCTP, dGTP, dTTP) at greater than 99% triphosphate purity by HPLC, certified DNase-, RNase-, Nickase-, and PCR-inhibitor-free, for standard PCR, qPCR, cDNA synthesis, and sequencing library preparation.

PureStrand 100mM dNTP Set 4 x 250

PureStrand 100mM dNTP Set 4 x 4 x 250

100bp DNA Ladders

<h2>What is a 100 bp DNA ladder?</h2>
&nbsp;
A 100 bp DNA ladder provides reference bands at 100-base-pair intervals, typically covering 100 bp to 1000 bp or 100 bp to 2000 bp depending on the variant, making it the most commonly used size standard for routine sizing of small PCR amplicons and restriction digest products. Most commercially available 100 bp ladders include a brighter reference band at 500 bp or 600 bp for quick orientation, and many are available in ready-to-load formats pre-mixed with loading dye and glycerol for direct pipetting into gel wells.
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<h2 dir="ltr">What you will find:</h2>
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<ul>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
ZR 100 bp DNA Marker (M5002-200) for high-resolution sizing of DNA fragments in routine electrophoresis workflows
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
PureView 100bp DNA Ladder for precise sizing and enhanced band visualization of small DNA fragments
</li>
</ul>
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<h2>How to choose and use a 100 bp DNA ladder</h2>
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Use a 100 bp ladder when your samples are mostly below 2 kb
A 100 bp ladder provides more resolution than a 1 kb ladder in the small-fragment range, since 100 bp spacing gives reference bands every 100 bp rather than every 1000 bp. If samples span a broader size range, the 1 kb Plus ladder extending down to 100 bp may be a more versatile single-ladder choice.
Run small-fragment gels on 1.5&ndash;2% agarose for best resolution
Fragments in the 100&ndash;500 bp range benefit from 1.5&ndash;2% agarose, which gives tighter, better-defined bands in this small-fragment window and reduces the risk of small bands reaching the gel front before larger fragments are adequately separated.
Look for a 500 bp or 600 bp reference band for easy orientation
Most 100 bp ladders include a brighter band at a convenient midpoint like 500 bp or 600 bp, which serves as a visual anchor for counting up or down in 100 bp intervals to identify the nearest ladder band.
Choose between upper ranges (1000 bp vs 2000 bp) based on sample sizes
Some 100 bp ladders cover only to 1000 bp (10 bands), while extended versions cover up to 2000 bp. If samples occasionally include products above 1000 bp, the extended range provides coverage without switching to a separate 1 kb ladder.
Pair with a 1 kb ladder when samples span both large and small size ranges
If an experiment includes both small PCR amplicons around 100&ndash;500 bp and larger restriction fragments above 2 kb, loading both a 100 bp and a 1 kb ladder in adjacent lanes provides accurate reference coverage across the full size range.
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<h2>Specifications context</h2>
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The 100 bp DNA ladder is one of the two most commonly used DNA size standards in routine molecular biology labs, alongside the 1 kb ladder, and most labs running small PCR products routinely keep a 100 bp ladder on hand. As of 2026, ready-to-load 100 bp ladder formats with a 500 bp or 600 bp bright reference band remain the default choice for routine agarose gel electrophoresis of small PCR products and restriction digest fragments.
<a href="https://mbpinc.net/contact-us">Contact the expert team at MBP</a> for assistance in selecting the right 100bp DNA ladder for your lab.

PureView Ladder - Product Sheet

PureView 100bp DNA Ladder

AZ-1131 by Azura Genomics — PureView™ 100bp DNA Ladder, 11 bands 100 bp–1.5 kb, dual high-intensity reference bands at 500 bp and 1.5 kb, 0.1 mg/mL, 5 µL/lane, ready-to-load. Stable at 25°C for 6 months. Available in 100, 500, and 1,000-lane packs.

PureView 100bp DNA Ladder 100 Lanes

PureView 100bp DNA Ladder 500 Lanes

PureView 100bp DNA Ladder 1,000 Lanes

2Kb DNA Ladders

<h2>What is a 2 kb DNA ladder?</h2>
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A 2 kb DNA ladder provides reference bands spaced at approximately 2-kilobase intervals, designed for gel electrophoresis where samples include large DNA fragments and where 1-kilobase spacing between reference bands would crowd too many bands into the upper region of a low-percentage gel. These ladders are particularly useful when working with large restriction digest products, BAC or cosmid clone inserts, large plasmids, or genomic DNA fragments in the 2&ndash;20 kb size range, run on 0.5&ndash;0.8% agarose to give these large molecules room to resolve.
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<h2 dir="ltr">What you will find:</h2>
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<ul>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
PureView PCR DNA Ladder for routine analysis of gel and size estimation of PCR product&nbsp;
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
2kb Opti-DNA Marker for accurate sizing of DNA fragments in gel electrophoresis&nbsp;
</li>
</ul>
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<h2>How to choose and use a 2 kb DNA ladder</h2>
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Use a 2 kb ladder when your samples are predominantly in the 2&ndash;20 kb size range
If most of your samples are in the multi-kilobase range, 2 kb spacing gives each reference band more separation on the gel, making it easier to estimate size in a region where 1 kb reference bands would be compressed together.
Run large-fragment gels on 0.5&ndash;0.8% agarose for adequate resolution
Standard 1% agarose does not give sufficient resolution for DNA fragments above 10 kb, and low-percentage gels of 0.5&ndash;0.8% provide the larger pore size needed for large molecules to migrate and resolve as distinct bands rather than compressing together at the top of the gel.
Confirm your 2 kb ladder covers the upper size range of your samples
Like any DNA ladder, the 2 kb ladder's largest defined band should be at or above the largest fragment in your sample, since fragments larger than the ladder's upper limit cannot be sized against it and may run together at the well or upper gel.
Plan for longer electrophoresis run times with low-percentage gels
Large DNA fragments migrate slowly through gel matrices, and low-percentage gels run at typical voltages require longer run times to achieve adequate separation of bands across the size range covered by the ladder.
Use a 2 kb ladder alongside a 1 kb ladder when samples span a wide size range
If your samples include both small and large fragments, loading both a 2 kb ladder and a 1 kb ladder in adjacent lanes provides reference coverage across the full size range without either ladder being suboptimal for part of your sample set.
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<h2>Specifications context</h2>
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The compression of larger DNA bands in the upper gel region is a fundamental property of agarose electrophoresis: the relationship between fragment size and migration distance is non-linear, so bands in the upper kilobase range are closer together in migration distance than the same size difference produces in the lower range. The 2 kb increment addresses this by providing wider-spaced reference points where 1 kb spacing would produce visually crowded bands on a low-percentage gel. As of 2026, 2 kb ladders are most commonly used when gel conditions are deliberately optimized for large fragments, such as for BAC clone verification or genomic DNA fragment analysis.
<a href="https://mbpinc.net/contact-us">Contact the expert team at Molecular Biology Products Inc. (MBP)</a> to get high-quality 2Kb DNA ladders tailored for your research workflows.

PureView PCR DNA Ladder

AZ-1121 by Azura Genomics — PureView™ PCR DNA Ladder, 6 bands 100 bp–2.0 kb, 750 bp reference band, 0.1 mg/mL, ready-to-load (no extra buffer). Stable at room temp 6 months. Available in 100-, 500-, and 1000-lane packs.

PureView PCR DNA Ladder 100 Lanes

PureView PCR DNA Ladder 500 Lanes

PureView PCR DNA Ladder 1000 Lanes

Prestained Protein Ladders

<h2>What are prestained protein ladders?</h2>
&nbsp;
Prestained protein ladders are protein molecular weight standards in which each protein band carries a covalent colored dye, typically coupling most bands in blue with two specifically colored bands, often green around 25 kDa and red around 75 kDa, that serve as easily visible reference anchors for quick orientation. Because the dye is visible without staining, the ladder is used to monitor protein migration in real time during SDS-PAGE and, critically, to verify that protein bands have transferred from the gel to the PVDF, nitrocellulose, or nylon membrane before antibody incubation in western blotting.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" role="presentation">PureView&trade; Prestained Protein Ladder for clear visualization of&nbsp; bands in SDS-PAGE</li>
<li dir="ltr" role="presentation">SmartCheck&trade; Tri-color Extended Range Plus Protein Marker for broad coverage of protein size&nbsp;</li>
<li dir="ltr" role="presentation">Opti-Protein Marker for accurate molecular weight estimation of proteins</li>
<li dir="ltr" role="presentation">Opti-Protein XL Marker for wider range analysis of proteins&nbsp;</li>
<li dir="ltr" role="presentation">Opti-Protein Ultra Marker for efficient protein separation workflows</li>
</ul>
&nbsp;
<h2>How to use prestained protein ladders</h2>
&nbsp;
Load prestained ladders directly from the tube without preparation
Most modern prestained protein ladders are supplied in gel loading buffer and are ready to load directly without heating, dilution, or addition of reducing agent, since modifying the formulation can cause dye dissociation or protein aggregation. Following the manufacturer's specific note about preparation avoids introducing variability.
Confirm the ladder's kDa range brackets your target protein's expected molecular weight
Match your target protein's expected size to the ladder's coverage: a mid-range ladder (10&ndash;180 kDa) suits most antibody targets in typical western blot experiments, while a broad-range (10&ndash;245 kDa) or extra-broad (3.5&ndash;260 kDa) ladder is needed when the target protein is very large.
Use the colored reference bands for quick gel and blot orientation
Colored reference bands at fixed kDa positions, typically green at 25 kDa and red at 75 kDa, allow you to orient the ladder pattern on the gel or membrane at a glance without counting all bands from the well, making it fast to identify the bands bracketing your target protein.
Check the manufacturer's MW table calibrated for your specific SDS-PAGE buffer system
Pre-stained ladder proteins have apparent molecular weights that differ depending on the SDS-PAGE buffer system used, such as Tris-Glycine versus Bis-Tris MOPS or MES, because the buffer's pH and composition affect SDS binding and protein charge. Using the manufacturer's annotated molecular weight values calibrated for your specific buffer gives more accurate sizing than a generic table.
Verify western blot transfer by confirming the prestained bands are visible on the membrane
After transfer, all or most prestained ladder bands should be visible on the blot membrane; missing or faint bands in a particular region indicate incomplete transfer in that molecular weight zone, guiding troubleshooting before antibody incubation and detection.
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<h2>Specifications context</h2>
&nbsp;
Prestained protein ladders are loaded at approximately 3&ndash;5 &micro;l per lane for gel visualization during SDS-PAGE, or at 1.5&ndash;2.5 &micro;l per lane for western blot transfer, since less ladder per lane is needed for adequate band visibility on the membrane than for gel visualization. As of 2026, ready-to-load prestained protein ladder formats supplied pre-formulated in SDS-PAGE loading buffer that require no heating, dilution, or reducing agent remain the dominant format for routine SDS-PAGE and western blotting, since preparation-free direct loading eliminates one class of user handling errors.
<a href="https://mbpinc.net/contact-us">Contact the helpful team at Molecular Biology Products Inc. (MBP)</a> and find the best prestained protein ladders for your next experiment.

Product Literature

PureView™ Prestained Protein Ladder

PureView™ Prestained Protein Ladder (AZ-1141) by Azura Genomics — 13 pre-stained bands from 5–245 kDa (Tris-Glycine) with green 25 kDa and red 75 kDa reference bands. Ready-to-use, no heating required. Available in 500 µl to 5 ml pack sizes.

Storage

PureView Prestained Protein Ladder, 500uL

PureView Prestained Protein Ladder, 2 x 500uL

PureView Prestained Protein Ladder, 4 x 500uL

High-Fidelity Master Mix

<h2 dir="ltr">What Is a High-Fidelity PCR Master Mix?</h2>
 A high-fidelity PCR master mix is a 2x concentrated, pre-formulated solution containing a proofreading DNA polymerase (Phusion, Q5, KOD, or Pfu-equivalent), dNTPs, MgCl2, and reaction buffer &mdash; requiring only the addition of template and primers to set up a reaction. The proofreading polymerase's 3' to 5' exonuclease activity corrects misincorporated nucleotides during synthesis, reducing the error rate roughly 50-100-fold compared to standard Taq master mixes. Choose a high-fidelity master mix whenever the amplicon will be cloned, mutagenised, or sequenced &mdash; not for routine genotyping, where standard Taq is sufficient and lower cost.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li data-section-id="uyjmeg" data-start="418" data-end="539">Streamlined post-amplification analysis with high-fidelity 2X red mix formulations with direct gel-loading capability</li>
<li data-section-id="1rh0fvx" data-start="540" data-end="630">Pre-optimized high-fidelity 2X PCR master mixes containing proofreading DNA polymerase</li>
<li data-section-id="6drhog" data-start="631" data-end="735">Reduced non-specific amplification and primer-dimer formation compared to standard Taq-based systems</li>
<li data-section-id="1pa7u4r" data-start="736" data-end="826">High-fidelity amplification suitable for cloning workflows requiring sequence accuracy</li>
<li data-section-id="1n3ow6j" data-start="827" data-end="925">2X master mix formats designed for reproducible amplification across a range of template types</li>
</ul>
<h2 dir="ltr"> How to Choose a High-Fidelity Master Mix</h2>
 Downstream Application Cloning into expression vectors, site-directed mutagenesis, and sequencing-bound amplicons all benefit from the reduced error rate of a high-fidelity master mix. Routine genotyping or colony screening does not require this level of accuracy and is typically served by standard Taq master mixes at a lower cost. Template Difficulty (GC Content, Length) Some high-fidelity master mix formulations are specifically optimised for GC-rich templates or long amplicons (&gt;5 kb), where standard high-fidelity formulations may show reduced yield. Check product-specific template compatibility notes before ordering for difficult targets. Extension Time and Cycling Protocol High-fidelity polymerases often have different optimal extension times per kilobase compared to standard Taq &mdash; some extend faster, shortening overall cycling time for long amplicons. Follow the manufacturer's recommended cycling parameters rather than reusing a standard Taq protocol. Cloning Method Compatibility Some high-fidelity master mixes produce blunt-ended products suited to Gibson Assembly or blunt cloning strategies; others may need additional A-tailing for TA cloning. Confirm compatibility with your intended downstream cloning method before selecting a product. Format Convenience vs. Component Flexibility The 2x master mix format minimises pipetting steps and improves reproducibility for routine high-fidelity workflows. Researchers needing to titrate individual components (e.g., additional MgCl2 for a specific template) may prefer the individual high-fidelity enzyme plus separate buffer instead. 
<h2 dir="ltr"> Specifications Context</h2>
 A 2x high-fidelity master mix is set up identically to a standard 2x Taq master mix &mdash; combined with template and primers at the manufacturer-specified ratio to reach 1x working concentration &mdash; but the included proofreading polymerase detects and removes misincorporated bases immediately after insertion, reducing the per-cycle error rate to approximately 10⁻⁶ per nucleotide. This level of accuracy matters specifically because any error introduced during amplification is propagated into the final cloned construct or sequencing read. High-fidelity master mixes are typically stored at &minus;20 &deg;C; lot-specific CoAs documenting activity and quality control are available on request. 
&nbsp;
<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at MBP today and get pre-optimized High-Fidelity Master Mix solutions for your lab.

TruFi™ II Ultra 2x PCR Mix

AZ-1920 by Azura Genomics — TruFi II Ultra 2x PCR Mix; &gt;75× fidelity vs Taq; 10 sec/kb extension; &gt;15 kb long PCR; 2× with buffer, MgCl₂, and dNTPs included; 200–8000 reaction formats.

AzuraProof 2x PCR Mix 100 Reactions

AzuraProof 2x PCR Mix 500 Reactions

AzuraProof 2x PCR Mix 1000 Reactions

TruFi™ II Ultra 2x PCR Red Mix

AZ-1930 AzuraProof™ HiFi PCR Red Mix by Azura Genomics delivers >75x fidelity vs Taq, 3'→5' proofreading, 10 sec/kb extension rate, and long-range PCR capacity beyond 15 kb — premixed with dNTPs, buffer, and red loading dye, in 200–8000 reaction pack sizes.

TruFi™ II Ultra 2x PCR Red Mix 100 Reactions

TruFi™ II Ultra 2x PCR Red Mix 500 Reactions

TruFi™ II Ultra 2x PCR Red Mix Red Mix 1000 Reactions

PCR & qPCR Film

Brochure

qPCR Optical Sealing film

AZ-7260 PURline™ qPCR Sealing Film by Azura Genomics — available in three variants: optically clear sticky adhesive for Bio-Rad instruments (AZ-7260), optically clear pressure-sensitive for ABI instruments (AZ-7265), and aluminum for PCR or storage (AZ-7270). All variants compatible with standard PCR plates, guaranteed below 5% evaporation, 100 sheets per pack.

Sealing film, qPCR Optical (sticky adhesive film) Bio-Rad Type, 10 bags of 10 membranes

Sealing film, qPCR Optical (pressure-sensitive adhesive) ABI Type, 10 bags of 10 membranes

Aluminum Sealing Film for PCR or storage 100/pk (10 bags of 10)

Rollers & Rotators

<h2>What are tube rollers and rotators?</h2>
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Tube rollers and rotators are low-speed mixing instruments that provide gentle, continuous agitation of tubes and bottles through rolling or inversion motion rather than high-speed shaking. A tube roller operates by rotating horizontal rollers that the tubes or bottles rest on, causing them to roll along their long axis in place, creating slow, even mixing of the tube contents without introducing air bubbles. A rotator (end-over-end mixer) clamps tubes in a wheel or drum that rotates at 5&ndash;30 rpm, inverting the tubes repeatedly through a full circle for thorough but gentle mixing.
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<h2 dir="ltr">What you will find:</h2>
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<a href="https://mbpinc.net/equipments/agitation-equipment/rollers-and-rotators">Rollers &amp; Rotators</a>:
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Mini &amp; Digital Rotators: Compact benchtop rotating mixers and programmable units designed for smooth, continuous sample inversion.
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Multi-Roller Tube Rollers: High-capacity 5-roller, 6-roller, and 10-roller systems engineered for uniform rolling of culture bottles and blood tubes.
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Temperature-Controlled Rotators: Special incubated models that combine steady sample rotation with precise temperature management.
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Platform Rockers: Basic single-platform shaking and rocking systems optimized for blot washes and gel staining procedures.
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<a href="https://mbpinc.net/equipments/agitation-equipment/rollers-and-rotators/roller-and-rotator-accessories">Roller &amp; Rotator Accessories:</a>
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<li data-path-to-node="4,0,0">Interchangeable Tube Holders: Snap-on racks and clips designed specifically to accommodate 1.5ml, 2.0ml, 15ml, and 50ml laboratory tubes.</li>
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<h2>How to choose rollers and rotators</h2>
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Choose a tube roller for blood collection and clinical tube mixing
Tube rollers are the standard instrument for homogenizing anticoagulated blood collection tubes before clinical testing, operating at 5&ndash;20 rpm to ensure even mixing of blood and anticoagulant without hemolysis from excessive speed. The roller format also suits other tubes and bottles that are too long for end-over-end rotation to work effectively in the space available.
Choose a rotator for antibody-bead incubations and immunoprecipitation
End-over-end rotators invert tubes through a full 360&deg; cycle, ensuring that beads settled at the tube bottom are continuously resuspended and that the bead surface is uniformly exposed to the solution throughout the incubation. This complete inversion is essential for immunoprecipitation, pull-down assays, and antibody-coupling incubations where beads must stay in suspension for efficient binding.
Consider the tube capacity and format each instrument accommodates
Tube rollers hold a fixed number of tubes of defined diameter on the roller surface; rotator wheels typically accommodate a defined set of tube positions for specific tube formats. Confirm that the instrument handles the tube diameter, length, and quantity you work with most commonly, and that accessories are available to accommodate additional formats.
Evaluate speed range against your mixing requirement
Blood sample homogenization requires gentle speed of 5&ndash;12 rpm to avoid hemolysis, while antibody-bead incubations can use faster rotation of 10&ndash;30 rpm for more active suspension maintenance. A variable-speed rotator provides flexibility across applications; a fixed-speed roller set at the correct blood mixing speed is adequate for dedicated blood handling.
Confirm whether incubator-compatible models are needed for your workflow
Rotator and roller incubations often require 37&deg;C for antibody binding or hybridization reactions. Models designed for incubator interior use have compact profiles and materials that tolerate incubator humidity and temperature, while standard bench models are not always rated for this environment.
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<h2>Specifications context</h2>
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Tube rollers used for blood sample mixing are typically operated at a fixed or low-speed range of 5&ndash;12 rpm, a range established from clinical literature showing that this rotation speed adequately homogenizes anticoagulated blood without inducing hemolysis from mechanical stress. As of 2026, compact benchtop tube rollers that fit inside standard incubators and cold rooms without taking up significant shelf space remain popular in clinical and research labs for routine sample preparation.
If you&rsquo;re unsure which rotation style or capacity fits your current workflow, the MBP team is here to help&mdash;<a href="https://mbpinc.net/equipments/rollers-and-rotators">contact us today for a custom quote.</a>

BLUline Variable Speed Rotator with tube holders, 115V

AZ-8250 by Azura Genomics is a variable-speed bench-top tube rotator operating at 5–70 RPM with three programmable mixing modes (Mix, Pause, Rock), accommodating tubes from 0.2 mL to 50 mL using included tube holders. Rated 100–240V/50–60Hz with a 2-year warranty.