Merck, C5890-1KG, Casein from bovine milk

General description
Casein from bovine milk is a phosphoprotein. There are four main types of Casein which make up approximately 80% of the total protein in bovine milk: α-s1 Casein, α-s2 Casein, β-Casein, and κ-Casein. Casein is proposed to be the main protective constituent in milk.
Application
Casein from bovine milk has been used:
to prepare casein hydrolysates
as a calibrating substance in biuret colorimetric method
as a supplement in nutrient agar for the determination of protease activity
to prepare protein-enriched diet for independent replicate lines of D. melanogaster

Biochem/physiol Actions
Partial gastrointestinal digestion of casein is a rich source of bioactive peptides, such as β-casomorphin. However, bovine casein is not homogeneous; variants A1 and B do lead to production of β-casomorphin 7 production, while A2 does not.