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R4877

Sigma-Aldrich

肾素 来源于小牛胃

≥20 units/mg protein

同義詞:

凝乳酶

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About This Item

CAS號碼:
酶委員會編號:
EC號碼:
MDL號碼:
分類程式碼代碼:
12352204
NACRES:
NA.54

形狀

lyophilized powder

比活性

≥20 units/mg protein

純化經由

crystallization

成份

Protein, ≥40%

儲存溫度

−20°C

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相關類別

應用

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

生化/生理作用

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。

包裝

包装规格取决于蛋白质含量

單位定義

一个单位将在 30°C 下每分钟凝结 10 mL 牛奶。

外觀

含有氯化钠的冻干粉末

分析報告

缩二脲法测定蛋白

象形圖

Health hazardExclamation mark

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 3


分析證明 (COA)

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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
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
G L Gilliland et al.
Advances in experimental medicine and biology, 306, 23-37 (1991-01-01)
Many aspects of the structure of chymosin are quite unique even though structure comparisons indicate a high degree of structural homology with other eukaryotic aspartic proteinases. The structural homology is shown to be directly related to the sequence homology which

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