Supplements & Additives

<h2 data-section-id="1go10h8" data-start="173" data-end="215">What are classic cell culture media?</h2>
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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.
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<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>
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<h2 data-section-id="1mfajxk" data-start="1218" data-end="1252">How to choose a classic medium</h2>
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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.
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<h2 data-section-id="17i0pj" data-start="5035" data-end="5061">Specifications context</h2>
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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

MSDS

Puromycin

Unit Quantity

Concentration

Recommended Protocol

Storage Condition

Shipping condition

<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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<ul>
<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>
</ul>
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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

Purity

Caution

Sodium Pyruvate Solution (100mM)

Sterility

Appearance

Disclaimer

Shipping Condition

Spectinomycin dihydrochloride

Streptomycin

Tetracycline

<h2 data-section-id="1fu0kiw" data-start="0" data-end="45">What are additional cell culture reagents?</h2>
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Additional cell culture reagents are specialized products used to support cell culture procedures that extend beyond routine media preparation, supplementation, and contamination control. These reagents perform specific functions such as cryopreservation, stable cell line selection, transfection, cell attachment enhancement, suspension culture protection, and metabolic supplementation.
While basal media, sera, buffers, and standard supplements provide the foundation for cell growth, additional cell culture reagents help researchers manipulate, preserve, modify, and optimize cells for specialized applications in research, biotechnology, and biomanufacturing.
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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">
High-Purity Animal Sera for enhanced cell proliferation and maintenance, e.g., USDA Fetal Bovine Serum (FBS)&nbsp;
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
Specialized Growth Supplements for primary cell cultivation, e.g., Macrophage Culture Supernatants and ECGS
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
Cell Viability and Counting Stains for accurate analysis of cellular density and health, e.g., Standardized Trypan Blue solutions&nbsp;
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
Isotonic Buffer Solutions for reagent dilution and gentle cell washing, e.g., High-quality PBS and DPBS and&nbsp; formulations
</li>
<li dir="ltr" style="font-family: arial, helvetica, sans-serif;" aria-level="1">
Antimicrobial and Hormonal Additives for optimization of cultures, e.g., Hydrocortisone and targeted Mycoplasma elimination cocktails
</li>
</ul>
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<h2 data-section-id="1e70xzx" data-start="889" data-end="938">How to choose additional cell culture reagents</h2>
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Cryopreservation reagents
Cryopreservation reagents protect cells during freezing and long-term storage. Dimethyl sulfoxide (DMSO) remains the most widely used cryoprotectant and is commonly included at 5&ndash;10% concentration in freezing media to reduce ice crystal formation that can damage cell membranes.
Ready-to-use freezing media are available in both DMSO-containing and DMSO-free formulations, allowing researchers to select the most appropriate option for sensitive cell types and specialized applications.
Selection antibiotics
Selection antibiotics are used to identify and maintain cells that have successfully incorporated a genetic construct carrying a corresponding resistance gene.
The optimal working concentration must be determined experimentally using a kill curve to identify the lowest concentration that completely eliminates non-resistant cells.
Transfection reagents
Transfection reagents facilitate the delivery of DNA, RNA, or gene-editing components into cultured cells.
Cationic lipid reagents are among the most commonly used transfection tools because they form complexes with nucleic acids that can enter cells through endocytosis. Polybrene is frequently used during viral transduction to improve vector binding and increase transduction efficiency.
Attachment factors
Certain primary cells, neuronal cultures, stem cells, and other sensitive cell types require enhanced surface adhesion. Attachment factors are applied as coatings to culture vessels before cell seeding.
Common attachment factors include:
<ul data-start="2797" data-end="2857">
<li data-section-id="vje5ia" data-start="2797" data-end="2812">Poly-D-lysine</li>
<li data-section-id="1gc9n1l" data-start="2813" data-end="2823">Collagen</li>
<li data-section-id="qxi803" data-start="2824" data-end="2837">Fibronectin</li>
<li data-section-id="x7geko" data-start="2838" data-end="2847">Laminin</li>
<li data-section-id="ixblas" data-start="2848" data-end="2857">Gelatin</li>
</ul>
These coatings improve cell attachment, spreading, survival, and differentiation.
Cell-protective agents
Suspension cultures and bioreactor systems expose cells to mechanical stress from agitation and aeration. Cell-protective surfactants such as Pluronic F-68 help reduce shear damage and improve cell viability during large-scale culture processes.
Glucose supplementation
Some cell culture protocols require glucose concentrations higher than those supplied by the basal medium. Concentrated glucose solutions can be added to support high-density cultures, serum-free systems, or specialized metabolic studies.
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<h2 data-section-id="1fljvas" data-start="4355" data-end="4380">Specifications context</h2>
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Selection antibiotic optimization remains a critical step in stable cell line development, with kill-curve experiments routinely performed before large-scale selection. Attachment factors continue to play an important role in primary cell, neuronal, and stem cell culture, while Pluronic F-68 remains widely used in suspension and bioreactor-based production systems.
<a href="https://mbpinc.net/contact-us">Contact the expert team at MBP</a> to request a quote for downstream-ready additional cell culture reagents.

Additional Cell Culture Reagents

Trypan Blue Stain

Supporting Protocol-Important Considerations for Cell Culture

Supporting Protocol-Cell Handling Instructions Upon Arrival

Flyer

Cell Line-Catalog (Volume 2)

Immortalized Cells-FAQ

Trypsin Neutralizing Solution

Shipping Conditions

Product Format

Intended Use

Certificate of Analysis

Warranty

Application

Trypsin-EDTA (0.25%)

TM999-100

USDA Research Grade Origin Fetal Bovine Serum

Usage

<h2>What are L-glutamine and amino acid supplements?</h2>
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L-glutamine and amino acid supplements are cell culture additives used to support cellular metabolism, growth, viability, and biosynthesis. They provide nutrients that may become depleted during culture or are required in greater quantities than those supplied by basal media alone. These supplements are commonly added to media such as DMEM, RPMI 1640, MEM, and DMEM/F-12 to optimize cell growth and maintain healthy cultures.
L-glutamine is one of the most important supplements in mammalian cell culture because it serves as a major energy source and is required for protein synthesis, nucleotide production, and glutathione synthesis. However, because free L-glutamine is unstable in solution and gradually breaks down into ammonia and pyroglutamate, many laboratories use stabilized alternatives such as GlutaMAX (L-alanyl-L-glutamine) for extended culture applications.
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<h2>What you will find:</h2>
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<ul>
<li>L-Glutamine stable formulations for sourcing of essential nitrogen</li>
<li>Non-Essential Amino Acids (NEAA) for growth media enhancement</li>
<li>Synthetic Polymer Coatings Poly-L-Ornithine and Poly-L-Lysine solutions for better cell attachment.</li>
<li>Extracellular Matrix Proteins used for cell adhesion and include high-purity Fibronectin and Vitronectin coating reagents</li>
<li>Adhesion Promotion Reagents for improving the surface properties of culture vessels.</li>
</ul>
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<h2>How to choose L-glutamine and amino acid supplements</h2>
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L-glutamine concentration and format
Most mammalian cell culture systems use L-glutamine concentrations between 2&ndash;6 mM, although requirements vary depending on the medium and cell type. It is commonly supplied as:
<ul>
<li>USP-grade powder for custom media preparation</li>
<li>200 mM liquid stock solutions for direct supplementation</li>
</ul>
Liquid stocks should be aliquoted and stored frozen to minimize repeated freeze-thaw cycles and preserve stability.
Understanding glutamine degradation
Free L-glutamine gradually breaks down in aqueous solution through a non-enzymatic process that produces ammonia and pyroglutamate. This degradation accelerates with increasing temperature, storage time, and exposure to common cell culture buffer systems.
Ammonia accumulation can negatively affect cell growth, viability, productivity, and experimental reproducibility, particularly during long culture periods without media replacement.
GlutaMAX and stable glutamine alternatives
GlutaMAX (L-alanyl-L-glutamine) is a stabilized dipeptide form of glutamine designed to resist degradation in culture media. Once taken up by cells, it is converted into usable glutamine while maintaining greater stability during incubation.
<ul>
<li>Reduced ammonia accumulation</li>
<li>Improved media stability</li>
<li>Better performance in long-term cultures</li>
<li>Less frequent media replacement requirements</li>
</ul>
For most applications, GlutaMAX can directly replace standard L-glutamine without protocol modifications.
MEM non-essential amino acids (NEAA)
NEAA supplements provide amino acids that cells can synthesize themselves but may benefit from receiving directly from the culture medium. Supplementation reduces the metabolic burden of amino acid production and often improves growth rates and cell viability.
NEAA solutions are typically supplied as 100X concentrates and diluted to 1X working concentration.
HT supplement
HT supplement contains hypoxanthine and thymidine and is commonly used following HAT selection during hybridoma production. It supports nucleotide synthesis through salvage pathways while cells recover from selection pressure.
MEM vitamin solution
Vitamin supplements provide additional growth-supporting micronutrients that may become limiting during prolonged culture or in demanding applications. These supplements are often used alongside amino acid supplementation to enhance culture performance.
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<h2>Specifications context</h2>
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The standard L-glutamine concentration used in many mammalian culture systems is approximately 2 mM, though actual requirements vary by medium formulation and cell type. Free L-glutamine remains stable as a dry powder and frozen stock solution but degrades progressively once added to liquid media.
Stabilized glutamine products such as GlutaMAX have become increasingly common because they maintain glutamine availability while minimizing ammonia accumulation during incubation. These formulations are particularly valuable in long-duration experiments and high-density culture systems.
<a href="https://mbpinc.net/contact-us">Contact the expert team</a> at MBP today to get research-grade supplements for your lab.