R4877
Rennin from calf stomach
≥20 units/mg protein
Synonym(s):
Chymosin
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About This Item
Recommended Products
form
lyophilized powder
Quality Level
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.
Signal Word
Danger
Hazard Statements
Precautionary Statements
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
Certificates of Analysis (COA)
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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
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
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The secretion of heterologous animal proteins in filamentous fungi is usually limited by bottlenecks in the vesicle-mediated secretory pathway. Using the secretion of bovine chymosin in Aspergillus awamori as a model, we found a drastic increase (40 to 80-fold) in
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
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
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