This product is the native form of trypsin, beta-trypsin. This product had not been cofirmed to be cationic nor anionic isoform.
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應用
对于胰蛋白酶消化肽，胰蛋白酶：肽 使用约为 1：100 至 1:20 的比例。从培养表面除去粘附细胞是本产品的一个典型应用。 从其底物中去除细胞所需的胰蛋白酶浓度主要取决于细胞类型和培养物的年龄。 胰蛋白酶也被用于细胞培养期间细胞的再悬浮、蛋白质组学研究中的蛋白质消化和各种凝胶内消化。 其他应用包括：通过基于膜的技术评估结晶，用在确定动力学陷阱的存在会限制蛋白质的折叠速率和产量的一项研究中。
生化／生理作用
胰蛋白酶切割赖氨酸和精氨酸残基的 C 端肽。 如果酸性残基位于切割位点的任一侧，则该反应的水解速度减慢，并且如果脯氨酸残基位于切割位点的羧基侧，则停止水解。 胰蛋白酶活性的最适 pH 为 7-9。 胰蛋白酶还可以起到裂解氨基酸合成衍生物的酯和酰胺键的作用。 将 EDTA 作为螯合剂添加到胰蛋白酶溶液中，用于中和钙离子和镁离子，这些离子遮蔽胰蛋白酶作用的肽键。 去除这些离子会增加酶活性。
丝氨酸蛋白酶抑制剂，包括 DFP、TLCK、APMSF、AEBSEF 和抑肽酶等，将抑制胰蛋白酶。
丝氨酸蛋白酶抑制剂，包括 DFP、TLCK、APMSF、AEBSEF 和抑肽酶等，将抑制胰蛋白酶。
成分
胰蛋白酶是由223个氨基酸残基的单链多肽所组成，通过从胰蛋白酶原在Lys - lle肽键处被切割去除N末端六肽而产生。 氨基酸的序列是由6个二硫桥所交联而成的。 这是胰蛋白酶、β-胰蛋白酶的天然形式。 β-胰蛋白酶可发生自溶，并在Lys - Ser残基处切割以产生α-胰蛋白酶。 胰蛋白酶是丝氨酸蛋白酶家族的一员。
注意
在1 mM HCl中的溶液经分装并储存在-20°C可稳定1年。Ca2+的存在将也会消除胰蛋白酶的自溶并维持其在溶液中的稳定性。 胰蛋白酶在2.0 M尿素、2.0 M盐酸胍或0.1% (w/v) SDS中可维持其绝大多数的活性。
單位定義
使用 BAEE 作为底物，一个 BAEE 单元，将在 pH 7.6，25℃ 下，每分钟产生 0.001 的 A253。
準備報告
可以1 mg/mL溶于1 mM HCl。
它还经TPCK处理并透析。 用L-1-甲苯磺酰胺-2-苯乙基氯甲基酮（TPCK）处理可降低通常存在于胰蛋白酶中的胰凝乳蛋白酶活性。
它还经TPCK处理并透析。 用L-1-甲苯磺酰胺-2-苯乙基氯甲基酮（TPCK）处理可降低通常存在于胰蛋白酶中的胰凝乳蛋白酶活性。
基底
抑制劑
產品號碼
描述
訂價
訊號詞
Danger
危險分類
Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
標靶器官
Respiratory system
儲存類別代碼
11 - Combustible Solids
水污染物質分類（WGK）
WGK 1
個人防護裝備
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
從最近期的版本中選擇一個：
分析證明 (COA)
Lot/Batch Number
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條款
Continuous spectrophotometric rate determination method using BAEE substrate measures trypsin activity, essential for enzyme characterization.
使用 BAEE 底物的連續分光光度速率測定方法可測量胰蛋白酶的活性，對於酵素的特性分析非常重要。
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Hello, we need for our experiments purified cationic trypsin. Did you ever confirm that the bovine trypsin you sell is cationic trypsin or PRSS1. Thanks
1 answer-
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I would like to ask, is the Trypsin, TPCK-treated already sterile when I solve the powder in sterile aquadest, or have I to filter the solution?
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This product is not sterile and will need to be sterile filtered. See product SLGP33RS, Millex GP, for a suitable filter options:
https://www.sigmaaldrich.com/product/mm/slgpr33rsHelpful?
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What is Product T1426, Trypsin from bovine pancreas, soluble in, and how do you recommend storing solutions?
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Trypsin is soluble in 1 mM hydrochloric acid (pH approximately 3). It is also surprisingly stable in 1 mM HCl. Solutions are stable for approximately 1 year when aliquoted and stored at -20°C. The presence of Ca2+ (20 mM) will also retard trypsin's ability to autodigest, and will therefore help to maintain the stability of the trypsin in solution.
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Does Product T1426, Trypsin from bovine pancreas, work for in-gel digestions?
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For in-gel digestions, we actually recommend using a methylated trypsin. Product No. T6567 is Trypsin from porcine pancreas, proteomics grade, dimethylated. For product T6567, the lysine residues of proteomics grade trypsin have been reductively methylated, resulting in a product that is resistant to autolysis. The T6567 has also been treated with TPCK to remove chymotryptic activity, further purified through affinity chromatography, and lyophilized. This results in an enzyme that gives highly specific cleavage.
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What is the Department of Transportation shipping information for this product?
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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How much of Product T1426, Trypsin from bovine pancreas, should I use to digest my peptide?
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For trypsin digestion of peptides, use a ratio (w:w) of about 1:100 to 1:20 for trypsin:peptide. Trypsin preparations usually contain some contaminating chymotrypsin and this should be inhibited with N-tosyl-L-phenylalanyl chloromethyl ketone (TPCK). Product No. T1426 has already been treated with TPCK, so it does not need to be further treated.
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What is the extinction coefficient for Product T1426, Trypsin from bovine pancreas?
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Various values have been reported in the literature for the extinction coefficient of bovine pancreatic trypsin. The E1%(280) values have ranged from 12.9 - 15.4. When we assay the protein content of Product No. T1426 in our labs here at Sigma, we use a value of 14.4.
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