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Safety Information

R4877

Sigma-Aldrich

Rennin from calf stomach

≥20 units/mg protein

Synonym(s):

Chymosin

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About This Item

CAS Number:
9001-98-3
Enzyme Commission number:
3.4.23.4 (BRENDA, IUBMB)
EC Number:
232-645-0
MDL number:
MFCD00132173
UNSPSC Code:
12352204
NACRES:
NA.54

form

lyophilized powder

Quality Level

200

specific activity

≥20 units/mg protein

purified by

crystallization

composition

Protein, ≥40%

storage temp.

−20°C

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Application

Rennin, also known as chymosin, is a milkclotting acid proteinase produced in the stomach of a calf. It is used in cheesemaking and to study neonatal gastric digestion .

Biochem/physiol Actions

Rennin, a 323 amino acid chain, is secreted as an inactive precursor which is then converted into an active enzyme through limited proteolysis. It cleaves the peptide bond between phenylalanine and methionine in K-Casein.

Packaging

Package size based on protein content

Unit Definition

One unit will coagulate 10 mL of milk per min at 30 °C.

Physical form

Lyophilized powder containing sodium chloride

Analysis Note

Protein determined by biuret.

Pictograms

Health hazardExclamation mark
GHS08,GHS07

Signal Word

Danger

Hazard Statements

H315,H319,H334,H335

Precautionary Statements

P302 + P352 - P305 + P351 + P338

Hazard Classifications

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

JAN Code

R4877-VAR:
R4877-25MG:
R4877-BULK:
R4877-2MG:
R4877-100MG:
R4877-5MG:

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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
Jung-Feng Hsieh et al.
Journal of agricultural and food chemistry, 60(8), 2039-2045 (2012-02-07)
Chymosin-induced coagulation of individual milk proteins during incubation at 30 °C was investigated using a proteomic approach. The addition of chymosin (0.006 units/mL) caused the milk proteins to coagulate after a 3 h incubation period. Approximately 88% of the milk
Filiz Kazak et al.
Veterinary research forum : an international quarterly journal, 13(4), 593-596 (2023-01-24)
Epidermal growth factor (EGF) has biological roles, including embryonic organ development, breast morphogenesis, breast cell proliferation, and mammary development. This study aimed to measure EGF concentration and evaluate its relationship with somatic cell count (SCC) in healthy water buffaloes (Bubalus
X P Jiang et al.
World journal of microbiology & biotechnology, 28(5), 2087-2093 (2012-07-19)
Chymosin can specifically break down the Phe105-Met106 peptide bond of milk κ-casein to form insoluble para-κ-casein, resulting in milk coagulation, a process that is used in making cheese. In this study, in order to obtain an alternative milk coagulant which
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
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