Tumor cells

Thawing Protocol

Cell Line Catalog (Volume 2)

THJ529 Cells

T8261 THJ529 Cells are human thyroid gland carcinoma (T3N1bMx) cells from a 45-year-old male, expressing p53 S241C and BRAF V600E oncogenes. Supplied by ABM as 1&times;106 cells/1.0 ml, frozen; BSL-2; RUO. MTA required.

THJ560 Cells

THJ560 Cells (T8262) by MBP are derived from anaplastic thyroid carcinoma (T4bN1bMx) and express p53 V274F and BRAF V600E. Tumorigenic in athymic nude mice. PDT 40h. BSL II. 1&times;106 cells / 1.0 mL, frozen. MTA required.

<h2>What are RNA tracking dyes?</h2>
&nbsp;
RNA tracking dyes are cell-permeant, fluorogenic nucleic acid stains that selectively bind RNA over DNA, remaining virtually nonfluorescent in the unbound state and lighting up brightly once bound to RNA, which gives a clean, low-background signal for live-cell imaging. The best-characterized commercial example binds RNA with absorption and emission maxima around 490/530 nm and only weak signal when bound to DNA, validated by RNase and DNase removal experiments showing that RNase treatment eliminates nucleolar and cytoplasmic labeling while DNase treatment does not.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Biotinylated Fluorophores: High-affinity markers such as TO1, TO3, and YO3-3PEG-Biotin, engineered for robust labeling and permanent capture of RNA molecules in various structural and functional assays.
</li>
<li dir="ltr" aria-level="1">
Desthiobiotin Modifications: Specialized tools like the TO1-3PEG-Desthiobiotin Fluorophore (G7956) that allow for reversible binding and gentle elution, making them ideal for enrichment workflows where maintaining the native state of the RNA is critical.
</li>
</ul>
&nbsp;
<h2>How to choose RNA tracking dyes</h2>
&nbsp;
Confirm the dye is genuinely RNA-selective rather than a general nucleic acid stain
A true RNA-selective dye shows bright fluorescence when bound to RNA but only weak signal when bound to DNA, a distinction worth confirming against published spectral and RNase/DNase validation data before committing to a specific dye for an RNA-specific application.
Match the dye to your specific RNA visualization goal
Different dyes in a related family vary in their subcellular binding behavior, with some binding cytoplasmic RNA specifically, useful for tracking RNA granule transport in living neurons, while others are optimized for general nucleolar and cytoplasmic RNA staining.
Plan your fixation method around the dye's stated compatibility
Methanol fixation after staining generally preserves an RNA tracking dye's staining pattern with minimal loss, while formaldehyde fixation can alter the staining pattern, a distinction worth confirming before choosing a fixation protocol for downstream analysis.
Consider a dye sampler kit when working with an unfamiliar cell or tissue type
Dye staining behavior can vary across different cell and tissue types, so a sampler kit containing several related dyes lets you empirically determine which performs best for your specific sample before committing to a single dye for a full study.
Confirm buffer compatibility for the staining solution
RNA tracking dyes are generally compatible with standard physiological buffers in the pH 7.0&ndash;8.0 range, including PBS, for preparing the staining solution used in live-cell experiments.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
RNA tracking dyes have been used to stain RNA cargo in exosomes in both live-cell samples and isolated exosome preparations, and to differentiate apoptotic from non-apoptotic cells when paired with other viability indicators, reflecting the breadth of live-cell RNA applications beyond simple visualization. As of 2026, newer experimental small-molecule RNA dyes reporting higher fluorogenic enhancement and improved photostability have been described in the academic literature as potential alternatives to the long-standing commercial standard, though these remain research-stage rather than established catalog items.
Visualize your transcripts with precision&mdash;<a href="https://mbpinc.net/contact-us">contact the MBP team</a> today for a quote on our professional RNA tracking solutions.

RNA Tracking dyes

DataSheet

MSDS

RNA Mango Insertion Guidelines

TO1-3PEG-Biotin Fluorophore

Unit Quantity

Storage Condition

Depositor

Shipping Condition

TO1-3PEG-Desthiobiotin Fluorophore

Shipping condition

TO3-3PEG-Biotin Fluorophore

<h2>What is Chemicals as a reagent category?</h2>
&nbsp;
Chemicals covers the broad range of chemical and biochemical reagents used across molecular biology, cell biology, biochemistry, and general laboratory work: biochemically relevant compounds like vitamins, buffer salts, amino acids, and enzyme substrates; general laboratory chemicals including solvents, acids, bases, and inorganic salts; and research-grade specialty chemicals for specific applications. Unlike application-specific categories such as Epigenetics or Electrophoresis, which organize reagents by research workflow, Chemicals organizes by the nature of the material itself.
&nbsp;
<h2 dir="ltr">What you'll Discover:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/reagents/chemicals/biochemical-reagents" title="Biochemical Reagents:">Biochemical Reagents:</a> High-quality metabolic inducers such as IPTG (G116), L-Arabinose (A2001-ZYM), and Cumate (CH065), along with essential buffers and enzyme stabilizers like TRIS (CH059), DTT (G025), and PMSF (G034).
</li>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/reagents/chemicals/inorganic-reagents-and-compounds" title="Inorganic Reagents &amp; Compounds:">Inorganic Reagents &amp; Compounds:</a> Ultra-pure essential chemical substances like Sodium Azide (CH052) designed for accurate laboratory buffer enhancement and sample conservation methodologies.
</li>
<li dir="ltr" aria-level="1">
<a href="https://mbpinc.net/reagents/chemicals/detergents-and-surfactants" title="Detergents &amp; Surfactants:">Detergents &amp; Surfactants:</a> Enhanced cell lysis and denaturing agents featuring 20% SDS (CH100) and concentrated 10X Tris-Glycine-SDS Buffer (CH125) for protein electrophoresis setup.
</li>
</ul>
&nbsp;
<h2>How to navigate Chemicals</h2>
&nbsp;
Start with Biochemical Reagents for biologically relevant compounds
Biochemical Reagents covers the subset of the catalog most relevant to molecular and cell biology workflows: vitamins and cofactors, buffer salts and ready-to-use buffer solutions, amino acids, and other compounds with specific roles in biological systems.
Check purity grade requirements before ordering a research chemical
Research-grade chemicals vary in purity from technical grade to ACS-certified, HPLC-grade, and molecular biology grade, with the appropriate grade depending on how the chemical is used; cell culture and enzymatic applications generally require higher purity than non-biological analytical or general lab use.
Confirm whether your chemical needs are better served by a specialty category
Some research chemicals belong more naturally in application-specific sections of the catalog, such as chromatin immunoprecipitation buffers in Epigenetics or gel running buffers in Electrophoresis, while general-purpose chemicals and biochemical reagents not tied to a single workflow type belong in this Chemicals branch.
Consider bulk ordering for high-consumption research chemicals
Common research chemicals like buffer salts, solvents, and vitamins are used in large quantities by active research labs, and bulk pricing can represent meaningful savings on frequently replenished reagents.
Look for certificates of analysis when accuracy matters for your application
Quantitative applications, including analytical standards, enzyme kinetics studies, and defined cell culture supplementation, require chemicals with documented lot-specific purity and concentration, typically confirmed by certificate of analysis provided with each lot.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Research-grade purity designations for laboratory chemicals follow widely adopted convention systems including ACS grade (meets American Chemical Society purity specifications), HPLC grade (verified purity for chromatographic applications), and molecular biology grade (certified free from nuclease, protease, and other activities that would interfere with molecular biology applications). As of 2026, pre-made, ready-to-use solutions for common biochemical reagents like PBS, HEPES buffer, and Tris-HCl continue to see growing adoption over powder or concentrated formats in labs prioritizing convenience and reproducibility over reagent cost per use.
<a href="https://mbpinc.net/contact-us">Reach out to the friendly team at MBP</a> now to get a quote for your particular research needs.

Chemicals

TRIS

Guarantee

<h2>What Are Laboratory Aspirators?</h2>
&nbsp;
Laboratory aspirators are compact vacuum systems designed to remove liquids from cell culture vessels, microplates, centrifuge tubes, and other laboratory containers without manual pipetting. These systems typically consist of an oil-free vacuum pump, adjustable pressure controls, a collection bottle, overflow protection mechanisms, replaceable filters, tubing, and handheld aspiration tools. Laboratory aspirators are widely used for cell culture media removal, supernatant aspiration, and washing procedures in applications such as ELISA, immunoassays, and general laboratory workflows.
&nbsp;
<h2>What you will find:</h2>
&nbsp;
<ul>
<li><a href="https://mbpinc.net/equipments/automated-liquid-handling/laboratory-aspirator"> Laboratory Aspirator: </a> Innovative systems like tabletop vacuum models and the Aspire&trade; model designed for routine waste handling, liquid removal, and cleanup of benchtop samples.</li>
<li><a href="https://mbpinc.net/equipments/automated-liquid-handling/laboratory-aspirator/laboratory-aspirator-accessories"> Laboratory Aspirator Accessories: </a> Adapters (single and multi-channel), silicone tubing, hydrophobic filters, handheld controllers, and collection bottles for suction setup optimization.</li>
</ul>
&nbsp;
<h2>How to Choose a Laboratory Aspirator</h2>
&nbsp;
Vacuum Pressure Range and Adjustability Choose a system with adjustable vacuum settings that match your applications. Lower vacuum levels are suitable for delicate cell culture work, while higher settings support rapid liquid removal from tubes, flasks, and larger vessels.
Collection Bottle Capacity Collection bottle size influences how frequently waste must be emptied during operation. Standard capacities are suitable for most workflows, while larger bottles support high-throughput or extended use.
Overflow Protection Features Reliable overflow protection prevents liquid from reaching the vacuum pump and ensures safe handling of biological materials.
Handpiece and Tip Compatibility Ensure the handpiece supports pipette tips, Pasteur pipettes, and required adapters for your workflow.
Noise Levels and Biosafety Cabinet Compatibility Compact, quiet systems are suitable for use in or near biosafety cabinets without disrupting airflow or workspace access.
Autoclavable Components Check which parts are autoclavable to simplify sterilization and maintain laboratory hygiene standards.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
Modern laboratory aspirators typically include oil-free pumps, adjustable vacuum controls, overflow protection systems, and replaceable hydrophobic filters for safe and efficient liquid removal.
Proper maintenance, including filter replacement and tubing inspection, helps maintain performance and extends equipment lifespan. Laboratory aspirators remain essential tools in research, clinical, and biotechnology laboratories.
Your hunt for a laboratory aspirator is over. <a href="https://mbpinc.net/contact-us">Reach out to the expert team</a> at Molecular Biology Products Inc. (MBP) today for a personalized quote.

Laboratory Aspirator

Tabletop Vacuum Aspirator System

General Information

Max Neg. Pressure

Neg. Pressure Regulation

Max. Evacuation Speed

Capacity

Dimensions (w x d x h)

Electrical Requirement

<h2 dir="ltr"> What Is a Taq PCR Master Mix?</h2>
 The 2x Taq PCR master mix format has become the standard for high-throughput molecular biology workflows because it combines reliability, convenience, and reproducibility in a single-tube format. By pre-optimising the concentrations of all PCR components, master mixes reduce pipetting steps and experimental variability compared to assembling reactions from individual components. This simplifies workflow setup and improves reproducibility. Select a formulation designed for your amplification needs.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr">High-Purity Enzymes: Versatile independent polymerases, such as the Azura&trade; and Accuris series, crafted for adaptable reaction adjustments and enhanced processivity with various DNA templates.</li>
<li dir="ltr">Full Reaction Solutions: All-inclusive systems such as the PCR Sure&trade; Kit that feature optimized dNTPs and buffers, offering a ready-to-use option for labs requiring dependable high-throughput performance and consistent outcomes.</li>
</ul>
<h2 dir="ltr"> How to Choose a Taq PCR Master Mix</h2>
 Standard vs. Dye-Containing Standard 2x master mixes require a separate loading dye addition before gel electrophoresis. Dye-containing master mixes include loading dye in the formulation, allowing direct gel loading after amplification &mdash; streamlining routine band-confirmation workflows. Component Pre-Optimisation A 2x Taq PCR master mix is a pre-formulated, double-concentrated solution containing Taq DNA polymerase, dNTPs (typically 200 &micro;M each at 1x), MgCl2, and PCR buffer at optimised concentrations &mdash; requiring only template and primer addition to set up a reaction. Throughput Scale High-throughput genotyping and colony screening benefit most from master mix consistency across multi-well plates, where individual component pipetting would introduce variability and time cost. Storage and Stability Master mixes are typically stable at &minus;20 &deg;C with multiple freeze-thaw cycles, though some dye-containing formulations may have slightly different stability profiles &mdash; check product-specific storage recommendations. Compatibility with Existing Protocols When switching from individual-component reactions to a master mix format, confirm that the pre-set MgCl2 and dNTP concentrations are compatible with your existing primer designs and templates, or adjust accordingly. 
<h2 dir="ltr"> Specifications Context</h2>
 A 2x Taq PCR master mix is set up by combining the master mix with template DNA and primers &mdash; typically at a 1:1 ratio of master mix to combined template/primer/water volume, achieving the final 1x working concentration. This format has become the standard for high-throughput molecular biology because it reduces pipetting steps and lot-to-lot variability across multi-well plate setups, important for reproducibility in genotyping and screening pipelines. Master mixes are typically stored at &minus;20 &deg;C with documented multiple freeze-thaw tolerance. When transitioning a protocol from individual-component PCR to a master mix format, running both formulations side-by-side on the same template and primer set is a useful validation step, confirming that the pre-set MgCl2 and dNTP concentrations in the master mix produce comparable yield and specificity to the previously optimised individual-component reaction before fully adopting the new format across a workflow. Product availability reflects MBP's catalogue as of mid-2026. 
&nbsp;
Enhance your amplification outcomes&mdash;<a href="https://mbpinc.net/contact-us">reach out to the MBP team </a>now for a quote on our expert Taq Polymerase offerings.

Taq PCR Master Mixes

Flyer

PCR Product Guide

Taq 2X PCR MasterMix

<h2 dir="ltr">What Is Taq DNA Polymerase?</h2>
 Taq DNA polymerase, isolated from the thermophilic bacterium Thermus aquaticus, was the enzyme that made modern PCR possible. Its thermostability &mdash; retaining activity after repeated denaturation cycles at 94-95&deg;C &mdash; eliminated the need to add fresh enzyme after each cycle, a limitation of earlier PCR approaches using non-thermostable polymerases.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
High-Purity Enzymes: Versatile standalone polymerases, including Azura&trade; and Accuris series, available in flexible formats from 500 to 6000 units to suit both small-scale projects and high-volume industrial applications.
</li>
<li dir="ltr" aria-level="1">
Optimized Performance: Specialized formulations designed for superior processivity and flexible reaction tuning, allowing for high-yield synthesis across diverse and challenging DNA templates.
</li>
</ul>
<h2 dir="ltr"> How to Choose Taq DNA Polymerase</h2>
 Standard vs. Hot-Start Standard Taq is active immediately at room temperature, suitable for most routine genotyping and screening applications. Hot-start Taq formulations remain reversibly inactive until a high-temperature activation step, improving specificity for multiplex or low-abundance template reactions. Buffer System Compatibility Optimised 10x PCR buffers are formulated to complement the enzyme's activity profile &mdash; using mismatched buffer systems from other suppliers can affect yield and specificity, so matched buffer-enzyme pairs are recommended. MgCl2 Titration Needs MgCl2 concentration is one of the most influential variables in PCR specificity and yield. Separate MgCl2 solutions allow titration for templates or primer sets requiring optimisation beyond standard buffer concentrations. Concentration and Unit Format Enzyme is typically supplied in units (U) reflecting incorporation activity per unit time &mdash; confirm the unit concentration matches your typical reaction scale to avoid excessive dilution or waste. Application Scope Genotyping, colony screening after transformation, diagnostic band confirmation, and general routine amplification are the primary applications for standard and hot-start Taq DNA polymerase. 
<h2 dir="ltr"> Specifications Context</h2>
&nbsp;
Taq DNA polymerase&rsquo;s thermostability &mdash; the ability to withstand repeated 94&ndash;95 &deg;C denaturation cycles without loss of activity &mdash; enabled practical PCR workflows based on a single thermostable enzyme. The enzyme lacks 3&prime;&rarr;5&prime; proofreading exonuclease activity, resulting in a higher error rate than high-fidelity polymerases (e.g., Phusion, Q5, KOD, Pfu-based systems), making it suitable for genotyping and screening but less appropriate for cloning- or sequencing-grade amplification.
Standard storage is at &minus;20 &deg;C, and many formulations are generally tolerant to multiple freeze&ndash;thaw cycles depending on buffer composition; lot-specific CoAs are available on request. In laboratories using both standard and hot-start Taq formulations, clear labelling and separation of storage conditions help prevent cross-use, particularly in assays where hot-start specificity is critical. A side-by-side validation on a known template when adopting a new Taq formulation can help establish expected amplification efficiency and specificity before routine use. Product availability reflects MBP&rsquo;s catalogue as of mid-2026. 
Refine your amplification results&mdash;<a href="https://mbpinc.net/contact-us" title="contact the MBP team" style="color: #236fa1;">contact the MBP team</a> today for a quote on our professional Taq Polymerase solutions.

Taq DNA Polymerase

<h2 data-section-id="1go10h8" data-start="173" data-end="215">What are classic cell culture media?</h2>
&nbsp;
Classic cell culture media refers to the foundational basal medium formulations that have underpinned mammalian cell culture since the mid-20th century: DMEM (Dulbecco's Modified Eagle Medium), MEM (Minimum Essential Medium), RPMI 1640, Ham's Nutrient Mixtures F-10 and F-12, IMDM (Iscove's Modified Dulbecco's Medium), and the combination formulation DMEM/F-12. Each is manufactured according to its originally published formula, with modifications limited to those necessary for consistent performance and stability of the medium over its shelf life. These media supply the amino acids, vitamins, glucose, salts, and (in most formulations) phenol red pH indicator that form the nutritional backbone of essentially all subsequent specialty, serum-free, and Advanced media derivatives.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" role="presentation">Selective Mammalian Antibiotics including Puromycin, Geneticin, and Hygromycin B for stable development of cell lines.</li>
<li dir="ltr" role="presentation">Broad-Spectrum Bactericidal Agents for routine contamination prevention, including Penicillin/Streptomycin and Gentamicin&nbsp;</li>
<li dir="ltr" role="presentation">Prokaryotic Selection Reagents for effective bacterial transformation, including Ampicillin, Kanamycin, Chloramphenicol, and Tetracycline&nbsp;</li>
<li dir="ltr" role="presentation">Antifungal and Antimycotic Solutions to maintain sterile cultures, including combined 100X cocktails and Amphotericin B (Fungizone)&nbsp;</li>
<li dir="ltr" role="presentation">Specialized Small Molecules for targeted biochemical assays, including Ganciclovir, Rapamycin, and Actinomycin D&nbsp;</li>
</ul>
&nbsp;
<h2 data-section-id="1mfajxk" data-start="1218" data-end="1252">How to choose a classic medium</h2>
&nbsp;
DMEM vs MEM
DMEM contains up to four times the amino acid and vitamin concentration of original Eagle's MEM, along with higher glucose levels, making it suitable for cell types with elevated nutrient demands &mdash; DMEM is broadly applicable across mammalian, insect, and plant cell phenotypes including primary cells, stem cells, and transformed lines. MEM remains widely used for monolayer culture of many standard cell types, with optional Hanks' or Earle's salt formulations and a calcium-free modification that permits suspension growth.
RPMI 1640 for suspension and hematopoietic culture
RPMI 1640, developed at the Roswell Park Memorial Institute for culturing human leukemic cells, is optimized for non-adherent cell types &mdash; lymphocytes and other blood cells &mdash; and contains glutathione plus higher biotin, B12, and PABA concentrations than DMEM or MEM. Despite its hematopoietic origin, RPMI 1640 supports a broad range of adherent lines (HeLa, T47D, RENCA, CT26.WT) when properly supplemented.
Ham's F-10/F-12 for CHO and specialized applications
Ham's nutrient mixtures were originally developed for CHO cell clones, HeLa cells, and mouse L-cells, and remain suited to hepatocyte culture, viral fusion experiments, and toxicity assays, with formulations available for use with or without serum. Coon's modification of Ham's F-12 roughly doubles the amino acid and pyruvate content and adds ascorbic acid, developed specifically for hybrid cells produced by viral fusion.
DMEM/F-12 for complex, rich-medium applications
DMEM/F-12 (1:1 mixture) combines DMEM's glucose, amino acid, and vitamin richness with Ham's F-12's zinc, putrescine, hypoxanthine, and thymidine, producing an extremely rich complex medium used for MDCK cells, glial cells, fibroblasts, and human endothelial cells &mdash; and serving as the basal medium for many serum-free Advanced formulations used in organoid and stem cell work.
IMDM for high-density rapid proliferation
IMDM further enriches DMEM with additional amino acids and vitamins, substituting potassium nitrate for ferric nitrate and adding HEPES and sodium pyruvate. IMDM's sodium bicarbonate buffer system (5&ndash;10% CO₂) and enriched composition make it well suited for rapidly proliferating, high-density cultures including Jurkat, COS-7, and macrophage cells.
Liquid vs. powder format
Liquid classic media are ready to use (after appropriate FBS and supplement addition) and include sodium bicarbonate in the formulation. Powdered media are manufactured without sodium bicarbonate, since it tends to off-gas in powder form &mdash; 3.7 g/L sodium bicarbonate must be added upon reconstitution, followed by sterile filtration. Powder formats offer cost and shipping-weight advantages for high-volume labs preparing their own media.
&nbsp;
<h2 data-section-id="17i0pj" data-start="5035" data-end="5061">Specifications context</h2>
&nbsp;
Classic media are manufactured according to originally published formulas, with stability-related modifications documented per product. DMEM's sodium bicarbonate buffer system at 3.7 g/L is standard across liquid formulations; powdered formats require this addition upon reconstitution along with 0.22 &micro;m sterile filtration. As of 2026, DMEM, DMEM/F-12, and RPMI 1640 remain the three most widely specified classic media across academic and biomanufacturing labs, with IMDM increasingly used for high-density suspension applications in bioprocessing.
For recombinant growth factors and cytokines used alongside classic media, see Recombinant Proteins. For supplementation reagents (GlutaMAX, NEAA, sodium pyruvate, HEPES), see Cell Culture Supplements &amp; Additives. Browse Mammalian Cell Culture for the broader category.
<a href="https://mbpinc.net/contact-us">Contact the expert team </a>at MBP to get highly efficient microbial control solutions for your lab.

Antibiotics

Tetracycline

Concentration

Purity

<h2>What Are DNA-Modifying Enzymes?</h2>
&nbsp;
DNA-modifying enzymes catalyze defined chemical changes to DNA molecules: T4 DNA Ligase seals nicks and joins fragments; T4 Polynucleotide Kinase (PNK) transfers a phosphate from ATP to 5'-OH termini; alkaline phosphatase removes 5'-phosphate groups to block self-ligation; Klenow fragment fills in 5' overhangs and removes 3' overhangs to generate blunt ends; DNA methyltransferases add methyl groups to adenine or cytosine residues for epigenetic studies or protection from restriction digestion. These enzymes are distinct from PCR polymerases (which amplify DNA) and restriction enzymes (which cleave at specific sequences). Use DNA-modifying enzymes any time you need to alter DNA end chemistry, join fragments, or protect sequences from downstream enzymatic cleavage.
&nbsp;
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Thermolabile UDG: An essential "cleanup" enzyme that removes carryover contamination in PCR by breaking down uracil-containing DNA, thus guaranteeing your results stay clear of artifact-induced sequence bias.
</li>
<li dir="ltr" aria-level="1">
T4 DNA Ligase: The crucial molecular adhesive, designed for the swift and efficient connection of blunt or cohesive-end DNA pieces in cloning and NGS adapter ligation.
</li>
<li dir="ltr" aria-level="1">
T4 Gene 32 Protein: A unique single-stranded DNA binding protein that maintains open templates, greatly enhancing the efficiency of enzymes in challenging amplification and recombination tests.
</li>
</ul>
&nbsp;
<h2>How to Choose DNA-Modifying Enzymes</h2>
&nbsp;
Ligation format
T4 DNA Ligase is the standard choice for cohesive-end and blunt-end ligation in cloning. For high-throughput library prep, choose ligase formulations optimized for 25 degrees C or room-temperature reaction to reduce protocol time. E. coli DNA Ligase uses NAD+ (not ATP) and is preferred for nick sealing in nick-translation reactions.
End repair requirements
Klenow fragment (3' to 5' exo-) fills 5' overhangs and removes 3' extensions to generate blunt ends required for blunt-end cloning or adaptor ligation; its 3'-&gt;5' exonuclease-minus version is used in NGS A-tailing steps to add a single 3'-dA overhang. T4 DNA Polymerase has stronger 3'-&gt;5' exonuclease activity than Klenow and is preferred for end polishing of PCR products with heterogeneous ends.
Phosphorylation/dephosphorylation
Use T4 PNK to add 5'-phosphates to PCR products or synthetic oligonucleotides before blunt-end ligation. Use alkaline phosphatase (CIP or SAP) on linearized vectors to prevent self-ligation; SAP is preferred when heat-inactivation at 65 degrees C is needed before downstream steps. Combine dephosphorylation and ligation in the same tube only after inactivating the phosphatase.
Methylation and protection
CpG methyltransferases and dam/dcm methylases protect recognition sequences from restriction cleavage or enable methylation-sensitive mapping. Dam methylase (methylates GATC sequences) and Dcm methylase (methylates CCWGG) are used to prepare templates resistant to DpnI digestion in cloning workflows where DpnI is used to remove template plasmid.
Purity certification
For RNA co-purification or RNA-sensitive workflows, confirm all DNA-modifying enzymes carry RNase-free certification. ABM lot-release QC includes RNase and DNase contamination tests; certificates of analysis are available on request through MBP.
&nbsp;
<h2>Specifications Context</h2>
&nbsp;
T4 DNA Ligase activity is defined as the amount of enzyme catalyzing 50% ligation of HindIII-cut lambda DNA fragments in 30 minutes at 16 degrees C in a 20 microliter reaction; 1 Weiss unit equals approximately 60 cohesive-end units. Optimal blunt-end ligation uses PEG 4000 at 15% (w/v) as a molecular crowding agent and runs at 25 degrees C to increase effective enzyme concentration. Streamlined NGS library prep workflows combine end repair, A-tailing, and adaptor ligation into a single-tube step, reducing total hands-on time to under 1 hour.&nbsp;
&nbsp;
Seize control of your DNA processes&mdash;<a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> now for a quote on our premium DNA-altering enzymes.

DNA-modifying enzymes

Thermolabile UDG

<h2>What Are Restriction Enzymes?</h2>
&nbsp;
Restriction enzymes are endonucleases originally isolated from bacteria, where they function as a primitive immune defense against foreign DNA (such as bacteriophages) by cleaving at specific recognition sequences. Over 3,500 Type II restriction enzymes have been characterized, recognizing palindromic or asymmetric sequences of 4-8 base pairs and generating either 5' overhangs (sticky ends), 3' overhangs, or blunt ends. The systematic naming convention reflects enzyme origin: EcoRI comes from Escherichia coli strain R; HindIII from Haemophilus influenzae strain Rd. Restriction enzymes are grouped into Types I, II, III, and IV based on cofactor requirements, cleavage site position, and structural complexity; Type II enzymes are almost exclusively used in research applications due to their defined cleavage positions. Choose restriction enzymes based on the recognition sequence present in your target, the end type required (sticky vs. blunt), and whether Golden Gate Assembly or conventional cloning is planned.
<h2 dir="ltr">&nbsp;</h2>
<h2 dir="ltr">What you will find:</h2>
&nbsp;
<ul>
<li dir="ltr" aria-level="1">
Enterokinase Cleavage Enzyme: A specific mammalian-produced protease for precise affinity tag removal from recombinant fusion proteins.
</li>
<li dir="ltr" aria-level="1">
DpnI: A specialized enzyme targeting methylated GATC sequences, ideal for template digestion in site-directed mutagenesis.
</li>
<li dir="ltr" aria-level="1">
Tn5 Transposase for Tagmentation: A high-efficiency enzyme for simultaneous DNA fragmentation and adapter ligation in NGS library construction.
</li>
</ul>
&nbsp;
<h2>How to Choose Restriction Enzymes</h2>
&nbsp;
Type IIP vs. Type IIS
Type IIP enzymes (EcoRI, HindIII, BamHI, NcoI, NheI) recognize palindromic sequences and cut within or immediately adjacent to the site, making them the standard choice for conventional restriction cloning using compatible cohesive ends. Type IIS enzymes (BsaI, BsmBI/Esp3I, SapI) cut at a fixed distance outside their recognition sequence, generating custom 4-nt overhangs that can be designed to create any desired sequence at the assembly junction -- the basis of Golden Gate Assembly, which allows ordered multi-fragment cloning in a single tube.
Recognition sequence frequency
4-cutter enzymes (MboI, AluI, TaqI) cut on average every 256 bp and are used for genome-wide restriction mapping or chromatin fragmentation. 6-cutters (EcoRI, HindIII) cut every ~4,000 bp on average and are standard for plasmid cloning. 8-cutters (NotI, PacI, AscI) cut rarely (every ~65,000 bp) and are used for mapping of large genomic regions or release of large inserts from BAC or YAC vectors.
Star activity sensitivity
Restriction enzymes can exhibit relaxed sequence specificity (star activity) at suboptimal conditions: excess glycerol (&gt;5%), non-standard buffers, extended digestion times, or non-standard divalent cations. High-fidelity (HF) enzyme variants reduce star activity by more than 1000-fold and are recommended for long digestion times or when high specificity is critical for downstream cloning.
Isoschizomers and compatible ends
Isoschizomers recognize the same sequence as a reference enzyme; neoschizomers recognize the same sequence but cut at a different position. BamHI (GGATCC, 5' overhang G) is compatible with BglII (AGATCT) overhangs and with MboI and Sau3AI overhangs -- useful for directional cloning strategies without re-engineering sites. Check isoschizomer tables before designing multi-enzyme cloning strategies.
Buffer compatibility
Most suppliers have rationalized their enzyme buffers into 2-4 universal buffer systems (e.g., CutSmart, Buffer 3.1, FastDigest buffers) that support the majority of enzymes, enabling double digestion without buffer exchange. Verify buffer compatibility before combining two restriction enzymes in a single tube.
&nbsp;
<h2>Specifications Context</h2>
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Restriction enzyme activity is defined as the amount of enzyme required to digest 1 microgram of lambda phage DNA (or substrate specified by the manufacturer) to completion in 1 hour at 37 degrees C in 50 microliters total volume. FastDigest enzyme formats complete digestion in 5-15 minutes at 37 degrees C, using a universal buffer. Heat inactivation is possible for most enzymes at 65-80 degrees C for 20 minutes, though some enzymes (NheI, SpeI, BstEII) are not heat-inactivatable and require column cleanup before downstream ligation. Over 3,500 Type II restriction enzymes are characterized in the REBASE database; commercially available catalogues cover approximately 200-300 common enzymes. For ligating restriction-digested fragments, see&nbsp;<a href="https://mbpinc.net/reagents/molecular-biology/enzymes-and-inhibitors/dna-modifying-enzymes">DNA-modifying enzymes</a> for T4 DNA Ligase and alkaline phosphatase.
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Refine your genomic editing&mdash;<a href="https://mbpinc.net/contact-us">contact the MBP team</a> today to request a quote for our high-fidelity enzymes.