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Dispase II, powder (Gibco™)

Dispase II (neutral protease) is an amino-endo peptidase that hydrolyzes the N-terminal peptide bonds of non-polar amino acid residues. This sequence is found with high frequency in collagen. Dispase II has a mild proteolytic action that makes it useful for the isolation and routine passaging of primary cells. Dispase II is relatively gentle, dissociates well at physiological temperature and pH, and generally maintains cell membrane integrity.

Gibco® Dispase II is produced in Bacillus polymyxa and packaged as a lyophilized, non-sterile powder for research use in cell or tissue dissociation, and to prevent clumping in suspension cultures. Gibco® Dispase II activity is guaranteed to be greater than 0.5 units/mg.

StemPro™ Accutase™ Cell Dissociation Reagent (Gibco™)

StemPro® Accutase® Cell Dissociation Reagent is a cell detachment solution of proteolytic and collagenolytic enzymes. Accutase® does not contain mammalian or bacterial derived products and is useful for the routine detachment of cells from standard tissue culture plasticware and adhesion coated plasticware, including Geltrex™, CELLStart™ and polymers. Accutase® performs exceptionally well in detaching primary and stem cells and maintaining high cell viabilty compared to animal origin enzymes such as trypsin. Some downstream applications following Accutase® treatment include analysis of cell surface markers, virus growth assay, cell proliferation, tumor cell migration assays, routine cell passage, production scale-up (bioreactor), and flow cytometry. Cell lines tested for Accutase® application include human embryonic stem cells, human mesenchymal stem cells, human neural stem cells and primary cells including macrophages, fibroblasts, keratinocytes, vascular endothelial cells, hepatocytes, and established cell lines such as adherent CHO and BHK cells and 293 cells. A complete list of published references is available on our website. Accutase® is a trademark of ICT, Inc.

Anti-Clumping Agent (Gibco™)

GIBCO® Anti-Clumping Agent is a concentrated liquid reagent that reduces cell clumping to assist in attaining higher viable cell densities in suspension culture. Anti-Clumping Agent is a gentle, animal origin-free, chemically defined formulation that contains no proteins, enzymes, hydrolysates, or components of unknown composition.

• Reduced cell clumping in suspension culture
• Higher viable cell densities
• Animal origin-free and chemically defined components
• Convenient packaging with a larger size now available
• Customization available to configure packaging and delivery

Simple and Gentle Cell Dissociation
Cell lines adapted to suspension culture can revert to a more adherent or aggregated “clumping" state. When this occurs, culture condition can be greatly improved by adding a gentle reagent to reduce clumping and adhesion instead of the harsh enzymes often found in cell dissociation products. Anti-Clumping Agent is a simple, gentle, concentrated solution which, when added to culture media (usually titrated between a 1:100 and 1:1000 dilution), can reduce cell clumping significantly.

Reduced Clumping, Increased Viability, Improved Protein Expression
Reduced cell clumping achieved through use of Anti-Clumping Agent is illustrated below (Fig 1). See also the data demonstrating improved viable cell density (Fig 2). Higher viable cell density contributes to the stabilization of culture conditions for better protein yield.

For actual cell dissociation, we recommend our animal origin-free TrypLE™ products.

Use Anti-Clumping Agent after Transfection
Anti-Clumping Agent is not recommended in all suspension cell culture conditions. For example, when creating a cell line using lipid cationic transfection, Anti-Clumping Agent can interfere with the transfection process, so in this case we recommend that Anti-Clumping Agent be used after transfection.

Animal Origin-free and Chemically Defined Components
Because Anti-Clumping Agent is made with only animal origin free and chemically defined components, you can be assured that the risk of adding adventitious agents to your culture system is minimized. Avoiding additives in your system that are not well defined can lead to more robust results from batch to batch.

Convenient and Customizable Packaging
Previously, Anti-Clumping Agent was only available in a 20 mL bottle. However, it is now available in a more economical and convenient 100 mL bottle. For even larger packaging, you can custom configure this product by clicking on the "Customize this Product" link under the "Add to Cart" button above or by emailing us at

Additional Information and Support
Please review the Manuals and Protocols provided below for additional information on successful use of this product. Direct any unanswered questions to our Technical Services group.

For Research Use Only. Not for use in diagnostics procedures.