ABM Reagents

<h2 dir="ltr"> What Are Cas9 Enzymes?</h2>
 Cas9 is the catalytic core of the CRISPR/Cas9 editing system. Sourced from Streptococcus pyogenes (SpCas9) or Staphylococcus aureus (SaCas9), recombinant Cas9 proteins are expressed and purified to high purity for direct use in ribonucleoprotein (RNP) complexes &mdash; currently the most widely recommended format for mammalian cell editing due to rapid activity onset and minimised off-target effects compared to plasmid-based delivery. Genome-editing performance depends on the appropriate nuclease format. Choose the Cas9 enzyme that aligns with your editing strategy.
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<h2 dir="ltr">What you will find:</h2>
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NLS-Tagged Cas9 and saCas9 Nucleases: Recombinant proteins of high purity designed for quick nuclear localization and strong initiation of double-strand breaks (DSBs) at specific genomic sites.
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Precision Cas9 Nickase (H840A): Tailored variants created for dual-nicking approaches to improve genomic stability and notably minimize off-target alterations.
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Lyophilized Nuclease Preparations: Nuclease-free, shelf-stable proteins that offer optimal adaptability for reconstitution and high-throughput automated CRISPR-related processes.
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Catalytically Inactive Null Mutants: "Dead" Cas9 (dCas9) proteins designed for DNA-binding research and specific epigenetic modification without changing the original sequence.
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Cas12a (asCpf1) Nucleases: Alternative CRISPR systems that focus on T-rich PAM sequences to broaden the range of spatial transcriptomics and targetable genomic areas.
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GFP-Tagged Cas9 Proteins: Fluorescently marked nucleases developed for real-time assessment of transfection efficacy and visual verification of cellular absorption.
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Endotoxin-Free Enzyme Formulations: Highly pure mixtures crucial for preserving cell viability in sensitive lentiviral applications and primary cell modifications.
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<h2 dir="ltr"> How to Choose a Cas9 Enzyme</h2>
 PAM Requirement Wild-type SpCas9 recognises any genomic locus flanked by an NGG protospacer adjacent motif (PAM), occurring roughly every 8&ndash;12 bp in mammalian genomes. SaCas9 requires NNGRRT, though engineered PAM variants (KKH, KRH, KRKH) expand targetable space. Off-Target Sensitivity High-fidelity Cas9 variants carry substitutions in the recognition lobe that reduce non-specific DNA contacts, lowering off-target cleavage while maintaining on-target activity comparable to wild-type SpCas9 &mdash; recommended for therapeutic cell engineering and base editing. Editing Mechanism Wild-type SpCas9 generates a blunt double-strand break repaired by NHEJ (indels for knockout) or HDR (precise insertions). Nickase (D10A) cuts only one strand for paired-nick HDR strategies with reduced off-target indels. dCas9 carries mutations in both nuclease domains, enabling CRISPRa/CRISPRi gene regulation without DNA cleavage. AAV Compatibility SaCas9, at approximately 1 kb smaller than SpCas9, fits a complete Cas9 + sgRNA expression cassette within the ~4.7 kb AAV packaging capacity &mdash; enabling single-vector in vivo delivery without split-vector complexity. Storage and Handling Recombinant Cas9 proteins are supplied for stability during shipping and short-term storage at &minus;20 &deg;C or &minus;80 &deg;C. Repeated freeze-thaw cycles reduce activity; aliquoting upon receipt is recommended.
<h2 dir="ltr"> Specifications Context</h2>
 An RNP is a pre-formed complex of recombinant Cas9 protein and sgRNA; once electroporated, it acts immediately and is degraded within hours, reducing off-target cleavage and avoiding immune stimulation associated with plasmid or mRNA delivery.&nbsp;Recombinant Cas9 in RNP format is validated across HEK293, HeLa, iPSCs, T cells, primary neurons, and hepatocytes, though electroporation parameters typically require cell-type-specific optimisation. Product offerings reflect MBP's catalogue as of mid-2026. 
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Reach out to the supportive <a href="https://mbpinc.net/contact-us" style="color: #236fa1;">team at MBP Inc.</a> now to obtain a quotation for the perfect Cas9 enzyme for your study.

Cas9 Enzymes

DataSheet

MSDS

saCas9 Nuclease NLS Protein

K189 by Applied Biological Materials is saCas9 Nuclease NLS Protein. 5′-NNGRRN-3′ PAM (preferably NNGRRT); SV40 NLS; endotoxin &lt;1.0 EU/µg; 5 µM (0.65 mg/mL); 32.5 µg/250 pmol/50 µL; 10× Buffer. For RNP editing and AAV delivery applications. No GFP. Storage buffer: 20 mM HEPES pH 7.5. Store at −20°C.

Unit Quantity

Cas Type

Cas Origin

Cas Protein Marker

Concentration

Format General

Storage Buffer

Storage Condition

Caution

Shipping Condition

saCas9 Nuclease NLS Protein (Lyophilized)

K152 by Applied Biological Materials is lyophilized saCas9 Nuclease NLS protein (SV40 NLS, C-terminus), supplied as 32.5 µg (250 pmol) with 10× Reaction Buffer. PAM: 5′-NNGRRT-3′ (preferred). Endotoxin &lt;1.0 EU/µg. Reconstitute in nuclease-free dH₂O or custom buffer. For RNP-based saCas9 CRISPR editing. Store at −20°C.

Endotoxin Level

saCas9 Nuclease Protein

K144 by Applied Biological Materials is recombinant saCas9 nuclease protein at 10 µM (1.30 mg/mL), supplied as 32.5 µg / 250 pmol (25 µL) with 10× Reaction Buffer. PAM: 5′-NNGRRT-3′ (preferred). No GFP. Endotoxin &lt;1.0 EU/µg. For RNP-based CRISPR editing with saCas9. Store at −20°C.

K044 by Applied Biological Materials is recombinant saCas9 Nuclease protein at 1,000 nM (130 µg/mL), supplied as 6.5 µg / 50 pmol (50 µL) with 10× Reaction Buffer. PAM: 5′-NNGRRT-3′ (preferred). No GFP. Endotoxin &lt;1.0 EU/µg. Entry-level size for RNP-based saCas9 CRISPR editing. Store at −20°C.

saCas9 Null Mutant NLS Protein

K147 by Applied Biological Materials is dsaCas9 — the catalytically inactive S. aureus Cas9 null mutant NLS protein (32.5 µg / 250 pmol / 25 µl). Binds DNA at NNGRRT PAM sites guided by saCas9-compatible sgRNA without DNA cleavage. For CRISPRi steric blockade, negative control in saCas9 editing experiments, and dCas9-based chromatin studies. Separate saCas9 sgRNA required.

saCas9 Null Mutant Protein

K146 by Applied Biological Materials is catalytically dead saCas9 (dSaCas9) Null Mutant Protein. Both nuclease domains inactivated; sgRNA-guided DNA binding retained. For RNP editing negative controls, CRISPRi, base editing, and dSaCas9-effector fusion applications at NNGRRT PAM sites. Store at −20°C.

<h2>What is gel loading dye?</h2>
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Gel loading dye, also called sample loading buffer or tracking dye, is a concentrated solution mixed with a DNA, RNA, or protein sample immediately before it is loaded into a gel well. It serves two essential functions: the density agent, typically glycerol at 30&ndash;60% or Ficoll, makes the sample denser than the running buffer so it sinks to the well bottom rather than diffusing back out; and the tracking dyes, most commonly bromophenol blue and xylene cyanol FF, provide visible colored bands that co-migrate at defined, approximate DNA equivalent sizes to allow the researcher to monitor migration progress and estimate when to stop the run.
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<h2 dir="ltr">What you will find:</h2>
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Azura SmartStain Loading Dye for the same preparation and loading
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Safe-Red loading dye for visualization of nucleic acids in electrophoresis workflows
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Safe-Green loading dye for gel analysis and DNA tracking applications
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SmartGlow&trade; Loading Dye with Safe Green Stain for visualization and integrated sample loading
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<h2>How to choose and use gel loading dye</h2>
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Use 6X loading dye at 1/6 volume of total sample volume
Most gel loading dyes are formulated as 6X concentrates so that adding one part loading dye to five parts sample brings the total volume to the final working concentration. For a 10 &micro;l final load, add 2 &micro;l of 6X loading dye to 8 &micro;l of DNA or RNA sample and mix well before loading.
Choose tracking dye colors that won't obscure your expected DNA band sizes
Bromophenol blue co-migrates with approximately 300&ndash;370 bp in a 1% TAE agarose gel, while xylene cyanol co-migrates with approximately 3,000&ndash;4,000 bp in the same conditions. If your samples are expected near those sizes, using a loading dye that includes orange G instead, which co-migrates below 50 bp, avoids masking bands with the tracking dye front.
Confirm EDTA is included if nuclease protection matters for your samples
A standard 6X loading dye contains 60 mM EDTA, which chelates divalent metal ions that nucleases require for activity, providing protection against DNA degradation during sample preparation and the gel run. If your protocol requires EDTA-free loading buffer, confirm the dye formulation before use.
For RNA samples, ensure your loading dye is RNase-free
RNase contamination in loading dye can degrade RNA samples during preparation before loading, so RNA gel experiments require either RNase-free certified loading dye or dye preparation from RNase-free reagents. Using the same nuclease-free water and handling precautions for loading dye as for the RNA samples themselves is standard practice.
Be aware that SDS-containing loading buffers for protein SDS-PAGE differ from nucleic acid loading dyes
SDS-PAGE protein loading buffers contain SDS, dithiothreitol or beta-mercaptoethanol as a reducing agent, and glycerol, which are specifically required for protein denaturation and separation under SDS conditions, whereas nucleic acid loading dyes contain no SDS or reducing agents. The two formulations are not interchangeable.
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<h2>Specifications context</h2>
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A standard 6X DNA loading dye formulation typically contains 10 mM Tris-HCl (pH 7.6), 0.03% bromophenol blue, 0.03% xylene cyanol FF, 60% glycerol, and 60 mM EDTA, making it compatible with both TAE and TBE running buffers. As of 2026, ready-to-use loading dyes pre-mixed as part of ready-to-load DNA ladder products remain popular for eliminating the need for a separate mixing step before gel load
<a href="https://mbpinc.net/contact-us">Contact the expert team at MBP</a> to obtain high-quality DNA loading dyes for your research workflows.

Loading Dye

Safe-Green™ Ligation Efficiency Test Report

Safe-Green

G108-G Safe-Green™ 6X DNA Gel Loading Dye by ABM — non-carcinogenic EtBr alternative; green stain; detects 0.2–0.6 ng DNA/band; UV and blue/LED light compatible; 2 tracking dyes; mix directly with sample. 1.0 ml; store at 4°C up to 2 years.

LED Viewer Compatibility

Safeview Series

Stain Color

Application

Shipping Conditions

Note

Shipping condition

Safe-Red

G108-R Safe-Red™ 6X DNA Gel Loading Dye by ABM — non-carcinogenic EtBr alternative; detects 0.6–1 ng DNA/band; UV and blue/LED light compatible; 2 tracking dyes; mix directly with sample and load on unstained gel. 1.0 ml; store at 18–25°C.

<h2>What is post-staining?</h2>
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Post-staining is the process of soaking a completed agarose or polyacrylamide gel in a staining solution after electrophoresis to detect separated nucleic acid or protein bands, in contrast to pre-staining, which incorporates a stain into the gel before casting. Since no stain is present in the gel matrix during the run, post-staining eliminates any potential effect of the stain on DNA migration, making it the preferred method when accurate fragment sizing is most important. For nucleic acids, GelRed post-stain is frequently recommended for its superior sensitivity; for proteins, Coomassie Brilliant Blue and silver stain are the standard post-staining methods.&nbsp;
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<h2 dir="ltr">What you will find:</h2>
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Safe-Red Gel post-stain: used post-electrophoresis for sensitive DNA visualization&nbsp;
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<h2>How to use post-staining reagents</h2>
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Soak the gel in stain solution for 20&ndash;30 minutes after electrophoresis
For most nucleic acid post-staining applications, submerging the gel in staining solution and placing it on a rocking platform for approximately 20&ndash;30 minutes gives adequate dye intercalation and band visualization without over-background staining.
Use water or dilute buffer as the soaking solvent for GelRed post-staining
GelRed post-staining is typically performed by soaking the gel in a diluted GelRed solution in water or dilute buffer for 20&ndash;30 minutes, which achieves high-sensitivity band detection without a separate destaining step, since gel background fades adequately during the staining soak.
Follow post-staining with a brief destaining step for cleaner backgrounds if needed
Some post-staining protocols, particularly for ethidium bromide post-staining, recommend a brief rinse or soak in water or buffer after staining to reduce background fluorescence for cleaner band visualization, though GelRed post-staining often does not require a separate destaining step.
For Coomassie staining of protein gels, follow fixation with a full destaining step
Coomassie Brilliant Blue post-staining of SDS-PAGE protein gels requires a fixation step to immobilize proteins in the gel, followed by staining, and then an extensive destaining step to wash Coomassie from the gel background while leaving stain in the protein bands, since the unstained background is blue and must be removed for bands to be visible.
Reuse post-stain solutions to reduce reagent cost
GelRed and other post-staining solutions can often be reused multiple times before their staining efficiency declines noticeably, and storing used stain solution appropriately and reusing it for subsequent gels reduces reagent cost per gel significantly, particularly for labs running large numbers of gels.
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<h2>Specifications context</h2>
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GelRed post-staining is recommended over GelRed pre-casting when accurate DNA fragment sizing is needed, since GelRed's larger molecular size can cause abnormal migration when pre-incorporated into the gel matrix. When both high sensitivity and accurate sizing are required, post-staining with GelRed is the recommended approach, with the stain solution reusable to reduce costs. As of 2026, GelRed and SYBR Green/Gold post-staining remain the highest-sensitivity fluorescent options for nucleic acid work, and in-house comparison studies consistently report GelRed showing greater sensitivity than ethidium bromide.
<a href="https://mbpinc.net/contact-us">Contact the helpful team at Molecular Biology Products Inc. (MBP)</a> to find a reliable post-stain solution for your lab.

Post-Stain

Safe-Red Gel

Safe-Red™ Gel G680 (ABM) — 10,000× non-carcinogenic EtBr replacement for agarose gel electrophoresis. Detects dsDNA, ssDNA, and RNA at 0.6–1 ng/band. Compatible with UV and blue-light LED. Pre-cast or post-stain. Store at 18–25 °C. Supplied as 1.0 ml.

<h2>What is pre-stain/casting in gel electrophoresis?</h2>
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Pre-staining is the practice of incorporating a fluorescent DNA-intercalating dye into molten agarose before it is poured into the gel tray and allowed to solidify, so that when DNA migrates through the gel under the electric field, bands become fluorescent as the DNA molecules bind dye molecules pre-distributed throughout the matrix. This approach allows bands to be monitored by UV or blue-light visualization during the run and eliminates the separate post-run soaking step that post-staining requires.
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<h2 dir="ltr">What you will find:</h2>
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Azura SmartStain Pre-Stain for visualization of DNA during gel casting
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SmartGlow&trade; Safe Green Pre-Stain for DNA/RNA detection in gels
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BlinkBlue&reg; SDS-PAGE Staining Buffer for gel analysis of proteins
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SafeView Classic gel stain for day-to-day nucleic acids visualization during electrophoresis
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<h2>How to choose and use pre-cast gel stains</h2>
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Add ethidium bromide at the standard concentration when safety constraints allow
Ethidium bromide, the classic pre-cast stain, is typically added to cooled, molten agarose at approximately 0.5 &micro;g/ml before pouring, providing excellent sensitivity with standard UV transilluminator imaging. Its mutagenicity requires standard handling precautions and specific waste disposal practices.
Substitute GelRed or SYBR Safe for a safer pre-cast stain option
GelRed and SYBR Safe can both be incorporated into molten agarose before casting as direct ethidium bromide substitutes at the manufacturer's recommended working concentrations, using standard UV (GelRed) or UV/blue light (SYBR Safe) for visualization on the same equipment.
Be aware that GelRed precast gels can affect DNA migration in some samples
GelRed's larger molecular size means it can cause abnormal band migration in precast gels for some samples, notably restriction digest products, compared with ethidium bromide precast gels, and this is why GelRed is specifically recommended for post-staining rather than pre-casting when migration accuracy matters most.
Cool agarose to approximately 55&ndash;60&deg;C before adding heat-sensitive staining reagents
Some intercalating dyes degrade or lose activity at the temperatures used to keep agarose liquid for pouring, and adding stain only after the agarose has cooled to approximately 55&ndash;60&deg;C, just before pouring, ensures consistent staining without heat-induced dye degradation.
Use blue-light gel imaging for downstream DNA recovery from pre-stained gels
If DNA will be excised from a pre-stained gel for downstream use, UV light should be minimized during excision because UV irradiation can introduce pyrimidine dimers and other photodamage that reduces downstream enzymatic efficiency. GelRed and SYBR Safe pre-cast gels can be imaged with a blue or amber light system to avoid this damage.
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<h2>Specifications context</h2>
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When ethidium bromide is used as a pre-cast stain, the positively charged EtBr molecules migrate toward the negative electrode during electrophoresis, moving out of the gel over time into the running buffer, which means the gel is effectively self-destaining during the run and background is reduced without a separate destaining step. As of 2026, EtBr-free labs most commonly use GelRed in post-staining applications for its superior sensitivity, while SYBR Safe is widely used as a pre-cast stain in labs that prioritize downstream DNA compatibility and blue-light gel excision.
<a href="https://mbpinc.net/contact-us">Contact the expert team at MBP</a> to get the right pre-staining/casting solutions for your lab.

Pre-Stain/Casting

SafeView  Classic

SafeView™ Classic G108 (ABM) — 10,000× non-carcinogenic EtBr replacement in DMSO for agarose gel electrophoresis. Detects dsDNA, ssDNA, and RNA at 1–2 ng/band, green fluorescence. Compatible with UV and blue-light LED. Pre-cast or post-stain. Store at 18–25 °C. Supplied as 1.0 ml.

<h2 dir="ltr"> What Are Lentiviral Purification &amp; Packaging Kits?</h2>
 Producing high-quality lentiviral stocks is a prerequisite for reproducible transduction experiments. Low-titer or impure virus preparations reduce transduction efficiency, introduce toxicity from residual cell debris, and compromise experimental reproducibility. Purification and packaging kits address every step from plasmid transfection through virus harvest and concentration. Vector production quality depends on efficient purification and packaging workflows. Choose the kit designed for your system.
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<h2 dir="ltr">What you will find:</h2>
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2nd and 3rd Generation Lentivirus Bundles combining transduction enhancers, transfection reagents, packaging mix, titer kits for complete workflows
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2nd and 3rd Generation Packaging System Mix for standardized viral production workflows
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DNAfectin&trade; Plus and Packaging Mix systems for enhanced transfection workflows
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Lentivirus Promoter Blast&trade; Kit for lentiviral expression studies driven by promoters
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SARS-CoV-2 S Protein Pseudotype Lentiviral Packaging Mix for pseudovirus-based research applications
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Ultra-Pure Lentivirus Purification Kit for viral cleanup and concentration
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ViralEntry&trade; Transduction Enhancer for improved transduction
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qPCR Lentivirus Titer Kit &amp; ViralEntry&trade; Bundle for optimized transduction workflows and&nbsp; viral quantification&nbsp;
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<h2 dir="ltr"> How to Choose a Purification &amp; Packaging Kit</h2>
 Concentration Method Available PEG precipitation kits work with a standard benchtop centrifuge, producing 10&ndash;100-fold concentration &mdash; the most accessible method for labs without ultracentrifuges. Ultrafiltration (100 kDa cutoff) offers high recovery (&gt;80%) while removing small molecules and unincorporated VSV-G. Ultracentrifugation provides the highest concentration (up to 1000&times;) but requires specialised equipment. Packaging Plasmid Generation 3rd generation systems (pMDLg/pRRE + pRSV-Rev + pVSV-G) split packaging elements across three plasmids and eliminate Tat for biosafety. 2nd generation systems use a single packaging plasmid + pVSV-G; some transfer vectors with RSV promoters produce lower titers with 3rd generation packaging unless using CMV-promoter variants (pLKO.1C). Starting Volume Scale Ultrafiltration units are compatible with both small-scale (&le;20 mL) and large-scale (up to 1 L) starting volumes using appropriately sized membranes. Plasmid Transfection Ratio For 3rd generation packaging, a 4:2:1:1 ratio of transfer vector:pMDLg/pRRE:pVSV-G:pRSV-Rev has been validated to maximise titer, with 20 &micro;g transfer vector per 15 cm dish as a standard starting point. Titer Assessment Method p24 ELISA measures total viral particle content; functional transduction assays (GFP or antibiotic selection) measure infectious titer; qPCR-based RNA titration measures packaged RNA copies. Functional titer is most relevant for transduction experiments. 
<h2 dir="ltr"> Specifications Context</h2>
 Lentiviral concentration workflows commonly combine PEG precipitation, ultrafiltration, or density-gradient methods to increase viral titer without requiring ultracentrifugation. Ultrafiltration systems using 100 kDa membranes efficiently retain lentiviral particles (approximately 80&ndash;120 nm) while removing smaller contaminants and free proteins. Following concentration, viral stocks are typically aliquoted into single-use volumes and stored at &minus;80 &deg;C because infectivity decreases with repeated freeze&ndash;thaw cycles and prolonged storage above freezing temperatures. Modern 2nd- and 3rd-generation packaging systems separate essential viral functions across multiple plasmids, including a dedicated VSV-G envelope plasmid, to support safer lentiviral production workflows. Product availability reflects MBP's catalogue as of mid-2026. 
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<a href="https://mbpinc.net/contact-us">Contact the expert team </a>at MBP Inc. and get reliable lentiviral purification and packaging kits for your lab today.

Purfication & Packaging Kits

Selection-Drug Killing Curve

Lentivector Packaging Protocol

Lentivirus Infection Protocol

Enhanced Lentivirus Safety Features-Replication Incompetency

Suggested MOI for Common Cancer Cell Lines

Lentiviral System FAQ

SARS-CoV-2 S Protein Pseudotype Lentiviral Packaging Mix

LV700 by Applied Biological Materials is a SARS-CoV-2 Spike protein pseudotype lentiviral packaging mix for producing ACE2-tropic, BSL-2-safe non-replicating pseudoviral particles. For spike-specific neutralization assays, entry inhibitor screening, and ACE2/TMPRSS2 entry studies. Store at −20°C or below.

<h2 data-section-id="3d1466" data-start="0" data-end="47">What are cell culture buffers and solutions?</h2>
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Cell culture buffers and balanced salt solutions are isotonic solutions used to wash, dilute, transport, and temporarily maintain cells outside of complete growth media. Unlike culture media, these solutions do not contain the nutrients and growth factors required for cell proliferation. Instead, their primary role is to maintain physiological pH and osmotic balance while protecting cells from stress during handling and experimental procedures.
The most commonly used cell culture buffers include PBS (Phosphate-Buffered Saline), DPBS (Dulbecco's Phosphate-Buffered Saline), HBSS (Hank's Balanced Salt Solution), and EBSS (Earle's Balanced Salt Solution). These solutions are widely used in cell washing, passaging, tissue dissociation, sample preparation, immunoassays, and short-term cell maintenance.
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<h2 dir="ltr">What you will find:</h2>
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<li dir="ltr" role="presentation">Standard Isotonic Buffers to wash cells, maintain osmotic balance, and dilute reagents.</li>
<li dir="ltr" role="presentation">Biological Buffering Agents for metabolic support and pH maintenance.</li>
<li dir="ltr" role="presentation">Cell Dissociation &amp; Neutralizing Reagents maintain high cell viability and are used for cell recovery, detachment, and passaging</li>
<li dir="ltr" role="presentation">Surface Coating &amp; Matrix Solutions with high-grade gelatin for improved cell attachment.</li>
<li dir="ltr" role="presentation">Insulin-Transferrin-Selenite (ITS), Bovine Serum Albumin (BSA), and high-purity Holo-Transferrin for enhanced cell growth and viability</li>
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<h2 data-section-id="1cuz7jf" data-start="1165" data-end="1216">How to choose cell culture buffers and solutions</h2>
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PBS vs. DPBS PBS is a simple sodium chloride/phosphate buffer solution. DPBS adds potassium chloride and may include calcium, magnesium, glucose, and pyruvate depending on formulation. The practical difference between PBS and DPBS formulations is minimal &mdash; both maintain pH 7.2-7.4 and osmolality ~280-315 mOsm/kg and are functionally interchangeable for standard washing, immunoassay, and sample preparation applications. If your protocol is sensitive to minor salt concentration differences, compare specific formulation sheets rather than assuming equivalence. &nbsp; Calcium/magnesium-free vs. calcium/magnesium-containing Calcium and magnesium facilitate cell-cell and cell-surface adhesion. Calcium/magnesium-free PBS, DPBS, or HBSS is required: before enzymatic dissociation (residual Ca/Mg inhibits trypsin, requiring more enzyme and harsher conditions &mdash; the most common cause of poor trypsinization results), for rinsing EDTA or other chelators from culture, and for minimizing cell-cell aggregation during gentle dissociation or suspension recovery. Calcium/magnesium-containing formulations support cell binding and clumping, useful for transport applications or attachment-dependent procedures. &nbsp; HBSS/EBSS vs. PBS/DPBS for short-term maintenance HBSS and EBSS include sodium bicarbonate buffering and may include glucose, providing meaningfully better short-term physiological support for cells &mdash; particularly under CO₂ atmosphere &mdash; than the simpler PBS/DPBS formulations. Use HBSS/EBSS when cells need to remain viable for a meaningful period outside complete growth media (tissue dissociation workflows, transport, short-term holding). Use PBS/DPBS for washing steps, immunoassay/Western blot dilutions, and sample preparation where osmotic balance &mdash; not metabolic support &mdash; is the requirement. &nbsp; Phenol red and glucose/pyruvate variants DPBS and HBSS are available with or without phenol red and with or without glucose/pyruvate, allowing matching to downstream applications (phenol red-free for fluorescence work; glucose/pyruvate-containing for short-term metabolic support). &nbsp; Endotoxin and quality testing Regular quality testing of balanced salt solutions includes osmolality, pH, stability, and screening for endotoxins and bacterial/fungal contamination. For immune cell handling and other endotoxin-sensitive applications, premium formulations document endotoxin levels below 0.005 EU/mL &mdash; a meaningfully tighter specification than standard research-grade buffers. &nbsp; Powder vs. liquid format Powdered balanced salt solutions are manufactured without sodium (to avoid sodium bicarbonate off-gassing during storage), requiring sodium bicarbonate addition, pH adjustment, and sterile filtration at time of preparation &mdash; following the same principle as powdered classic media.Specifications context
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<h2>Specifications context</h2>
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Most balanced salt solutions are formulated to maintain physiological conditions with a pH of approximately 7.2&ndash;7.4 and osmolality ranging from about 280&ndash;315 mOsm/kg. These properties help minimize osmotic stress and maintain cell viability during handling.
Calcium- and magnesium-free DPBS remains one of the most commonly specified buffers for cell dissociation workflows because it improves the effectiveness of trypsin and other detachment enzymes. HBSS and EBSS continue to be widely used when short-term metabolic support is required outside complete growth media.
<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at MBP today to get high-purity buffers and solutions for your lab.

Buffers & Solutions

Buffers/Salts

SB216763

SB216763 G607 — selective GSK-3 inhibitor, ≥98% purity (NMR &amp; MS verified), 5.0 mg solid. MW 371 g/mol, formula C₁₉H₁₂Cl₂N₂O₂. Aids stem cell self-renewal and Wnt pathway activation. Stable 2 years. Store at −20 °C.