α-糜蛋白酶 来源于牛胰腺

3.4.21.1 ( BRENDA | IUBMB )

232-671-2

MFCD00130481

NA.54

The enzyme from Sigma has been used to assess the effect of limited proteolysis with α-chymotrypsin on the sperm penetration.
α-Chymotrypsin from bovine has been used in a study to inform proteasome inhibition in order to advance anticancer research. α-Chymotrypsin from bovine has also been used in a study that functionalized surface anchored poly(methylhydrosiloxane) thin films on oxidized silicon wafers.
α-Chymotrypsin from bovine pancreas has been used:

• as a supplement for the collection of semen into Tris diluent
• as one of the proteases in the analysis of major histocompatibility complex (MHC) class II protease sensitivity assay
• as a component in YEPD broth for biofilm dispersion assay
• in the preparation of chitinase–chymotrypsin–DMSO buffer (CCD buffer) for enzymatic digestion of larvae

α-Chymotrypsin is a serine peptidase and has 241 amino acid residues contained in three polypeptide chains (A chain-13 residues, B chain-131 residues, and C chain-97 residues) linked by disulfide bridges. Molecular weight of this enzyme is found to be 25 kDa. Its pI is 8.75. It selectively hydrolyzes peptide bonds on the C-terminal side of tyrosine, phenylalanine, tryptophan, and leucine. Ca²⁺ activates and stabilizes the enzyme. The enzyme is inhibited by diisopropyl fluorophosphate (DFP), phenylmethanesulfonyl fluoride (PMSF), N-p-tosyl-L-phenylalanine chloromethyl ketone (TPCK), chymostatin, aprotinin, α1-antitrypsin, and α2-macroglobulin, 10 mM Cu²⁺ and Hg^2+.
一种丝氨酸蛋白酶，能将与芳香烃或其他大型疏水性侧链(Tyr、Trp、Phe、Met、Leu)结合的肽从键的羧基端水解。

在 pH 7.8 和 25℃ 下，一单位本品每分钟可水解 1.0μmol BTEE。

由 A1%/280 测定的蛋白质

200

aseptically filled

Type IV-S

solid

≥40 units/mg protein

25 kDa

protein, ≥85% UV

vial of 5 mg

P00767

−20℃

cow ... CTRB1(618826)

GHS07,GHS08,GHS09

Danger

H302 - H315 - H319 - H334 - H335 - H400

P261 - P273 - P301 + P312 - P302 + P352 - P304 + P340 + P312 - P305 + P351 + P338

Acute Tox. 4 Oral - Aquatic Acute 1 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

Respiratory system

11 - Combustible Solids

WGK 1

dust mask type N95 (US), Eyeshields, Faceshields, Gloves