价格：570 200
货号：03-052-1A、03-052-1B
规格： 500ml、100ml
产品名称：Trypsin EDTA Solution B (0.25%), EDTA (0.05%),
with Phenol Red
胰酶（胰蛋白酶0.25%，EDTA0.05%）
【产品介绍】
Trypsin, an animal-derived product, is the most commonly used enzyme for harvesting cells
in culture. Trypsin is a pancreatic serine protease (proteolytic) enzyme with specificity for peptide bonds
involving the carboxyl group of the basic amino acids, Arginine and Lysine. Trypsin often contains
a crude mixture of lipases, nucleases, polysaccharides and proteases extracted from Porcine pancreas.
Most cell cultures grow as a single thickness cell layer or sheet attached to a substrate known as a
monolayer. When subculturing adherent cells, these intercellular and cell-to-substrate links or
connections must be gently dissociated. Proteolytic enzymes such as Trypsin (i.e. a serine peptidase),
breaks or gently separates these bonds by creating a single-cell suspension from which new subcultures
are realized. Trypsin solutions are widely utilized as cell dissociation reagents for continuous cell culture
of adherent growing cells. Trypsin proteolysis or trypsinization is a process in which proteins have been
digested or treated with Trypsin and are thus said to be trypsinized.
Biological Industries' Trypsin is designed not only to gently dissociate cells from almost any support
substrates but also as well as from each other in order to actualize cell manipulation techniques in
addition for other studies that require intact cell-surface proteins. Trypsin, as a solution, is available
in a varied array of ormulations with or without EDTA. EDTA is a chelator that binds calcium and
magnesium ions that may otherwise inhibit the Trypsin activity which then hydrolyzes and gains
access to the intercellular bonds being cell-cell and/or cell-substrate bonds. Crude Trypsin is often
the subculturing agent of choice for cell dissociation/disaggregation of adherent cells although the
treatment may be cytotoxic if prolonged. Over-trypsinization is a common cause of subculture problems.
The use of Crude Trypsin often involves multiple changes and the variability among lots can dramatically
influence the effectiveness of the dissociation process. Regarding the use of Crude Trypsin, some important
facts must be noted:
v Cells must NEVER remain in the Crude Trypsin for longer than 3-5 minutes as they may be seriously
damaged in the process (i.e. damage to the intracellular proteins).
v Cells should NEVER be left without a fluid layer
v Do not permit prolonged growth on culture ware as the cells will be very difficult to remove(i.e. after5-7 days)
In a serum-free culture environment, the cells must be separated by rapid centrifugation or by
utilizing Trypsin inhibitors such as Soybean Trypsin Inhibitor (SBTI). SBTI is a single polypeptide
that forms a stable, stoichiometric, enzymically inactive complex with Trypsin thereby reducing
the availability of Trypsin by, more or less, binding chymotrypsin. However, with Biological Industries
' Soybean Trypsin Inhibitor, any excess Crystalline Trypsin may be completely neutralized, thereby
avoiding the use of serum for this purpose. The cells may then be resuspended successfully in a
suitable growth medium.
Predominant Characteristics of Trypsin EDTA Solution B include:
§ Animal-Derived Source
§ 0.05% EDTA Concentration
§ Meets USP and EPTesting Specifications
§ Cell-Culture-Tested
§ Suitable for Cell-Culture Applications
§ Long-Storage When Handled Properly Under Defined Conditions
说明书下载：
6381101576589975509279469.pdf