R4877
肾素 来源于小牛胃
≥20 units/mg protein
别名:
凝乳酶
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关于此项目
化学文摘社编号:
UNSPSC Code:
12352204
NACRES:
NA.54
EC Number:
232-645-0
MDL number:
Specific activity:
≥20 units/mg protein
form
lyophilized powder
specific activity
≥20 units/mg protein
purified by
crystallization
composition
Protein, ≥40%
storage temp.
−20°C
Quality Level
Application
Rennin（凝乳酶），也称为 chymosin（凝乳酶），是在小牛胃中产生的乳凝酸蛋白酶。它用于奶酪制作和研究新生儿胃消化。
Biochem/physiol Actions
凝乳酶，一条 323 个氨基酸链，分泌时为无活性前体，然后通过限制性蛋白水解转化为活性酶。它能裂解 K-酪蛋白中苯丙氨酸和甲硫氨酸之间的肽键。
Packaging
包装规格取决于蛋白质含量
Physical form
含有氯化钠的冻干粉末
Analysis Note
缩二脲法测定蛋白
Other Notes
一个单位将在 30°C 下每分钟凝结 10 mL 牛奶。
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 3
法规信息
低风险生物材料
此项目有
Kirsten Kastberg Møller et al.
Journal of agricultural and food chemistry, 60(21), 5454-5460 (2012-05-09)
Bovine chymosin constitutes a traditional ingredient for enzymatic milk coagulation in cheese making, providing a strong clotting capacity and low general proteolytic activity. Recently, these properties were surpassed by camel chymosin, but the mechanistic difference behind their action is not
Xin-ping Li et al.
Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology, 28(7), 715-717 (2012-07-10)
To optimize the prochymosin (pCHY) gene codons and express the gene in Escherichia coli (E.coli), and to prepare its antiserum and detect chymosin protein specifically. According to codon usage bias of E.coli, prochymosin gene sequence was synthesized based on the
Neil D Rawlings et al.
Nucleic acids research, 40(Database issue), D343-D350 (2011-11-17)
Peptidases, their substrates and inhibitors are of great relevance to biology, medicine and biotechnology. The MEROPS database (http://merops.sanger.ac.uk) aims to fulfil the need for an integrated source of information about these. The database has hierarchical classifications in which homologous sets
B Foltmann et al.
The Journal of biological chemistry, 254(17), 8447-8456 (1979-09-10)
The complete amino acid sequence of calf chymosin (rennin) (EC 3.4.23.4) has been determined. The sequence consists of a single peptide chain of 323 amino acid residues. The primary structure of the precursor part of calf prochymosin was published previously
J A Vallejo et al.
Journal of dairy science, 95(2), 609-613 (2012-01-28)
The first step in cheesemaking is the milk clotting process, in which κ-caseinolytic enzymes contribute to micelle precipitation. The best enzyme for this purpose is chymosin because of its high degree of specificity toward κ-casein. Although recombinant bovine chymosin is
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