T8802
胰蛋白酶 来源于牛胰腺
TPCK Treated, essentially salt-free, lyophilized powder, ≥10,000 BAEE units/mg protein
产品名称
胰蛋白酶 来源于牛胰腺, TPCK Treated, essentially salt-free, lyophilized powder, ≥10,000 BAEE units/mg protein
biological source
bovine pancreas
sterility
aseptically filled
form
essentially salt-free, lyophilized powder
specific activity
≥10,000 BAEE units/mg protein
mol wt
23.8 kDa
composition
protein, ≥95%
solubility
hydrochloric acid: soluble 1 mM, clear
foreign activity
Chymotrypsin ≤0.1 BTEE units/mg protein
storage temp.
−20°C
Quality Level
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Analysis Note
E1%/280法测定蛋白
Application
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。
胰蛋白酶可使贴壁细胞从组织培养板上脱落，以用于传代。胰蛋白酶用于研究评估大分子群集对人α-乳清蛋白结构稳定性的影响。 胰蛋白酶也用于研究哈茨木霉分泌组的BN-PAGE分析。
Biochem/physiol Actions
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。
General description
胰蛋白酶分子有两个结构域：一个与酶活性位点和色氨酸残基有关；另一个与8-苯胺基萘-1-磺酸盐结合有关。
Other Notes
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。
在25℃、pH 7.6条件下，使用BAEE作为底物，一单位BAEE每分钟可产生0.001的ΔA253 。反应体积= 3.2 ml（1 cm光程）。
查看更多关于 胰蛋白酶的信息， 请访问 www.sigma-aldrich.com/enzymeexplorer
Preparation Note
TPCK处理
signalword
Danger
hcodes
Hazard Classifications
Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
存储类别
11 - Combustible Solids
wgk
WGK 1
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
法规信息
低风险生物材料
此项目有
John C Tran et al.
Analytical chemistry, 80(5), 1568-1573 (2008-01-31)
Although well-established as a technique for protein purification, the application of continuous elution tube gel electrophoresis to proteome fractionation remains problematic. Difficulties associated with sample collection, particularly at the high mass range or at low sample loadings, continue to plague
Adelson Joel da Silva et al.
Proteomics, 12(17), 2729-2738 (2012-06-30)
Plant cell wall-degrading enzymes produced by microorganisms possess important biotechnological applications, including biofuel production. Some anaerobic bacteria are able to produce multienzymatic complexes called cellulosomes while filamentous fungi normally secrete individual hydrolytic enzymes that act synergistically for polysaccharide degradation. Here
Piliang Hao et al.
Journal of proteome research, 14(2), 1308-1314 (2014-12-17)
Nonenzymatic deamidation occurs readily under the condition of trypsin digestion, resulting in the identification of many artificial deamidation sites. To evaluate the effect of trypsin digestion buffers on artificial deamidation, we compared the three commonly used buffers Tris-HCl (pH 8)
De-Lin Zhang et al.
Acta biochimica et biophysica Sinica, 44(8), 703-711 (2012-06-28)
The folding of protein, an important process for protein to fulfill normal functions, takes place in crowded physiological environments. α-Lactalbumin, as a model system for protein-folding studies, has been used extensively because it can form stable molten globule states under
A E M Jørgensen et al.
Osteoarthritis and cartilage, 30(6), 886-895 (2022-04-01)
Cartilage collagen has very limited repair potential, though some turnover and incorporation has not been fully excluded. We aim to determine the regional turnover of human osteoarthritis cartilage. Patients scheduled for knee joint replacement surgery due to osteoarthritis were recruited
实验方案
Continuous spectrophotometric rate determination method using BAEE substrate measures trypsin activity, essential for enzyme characterization.
本方案适用于使用Nα-苯甲酰基-L-精氨酸乙酯（BAEE）作为底物测定胰蛋白酶活性。本方案是基于连续分光光度速率测定（A253，光程= 1cm）方案：
相关内容
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