Kappa-casein; Kappa-casein stabilizes micelle formation, preventing casein precipitation in milk.

Alpha-lactalbumin; Regulatory subunit of lactose synthase, changes the substrate specificity of galactosyltransferase in the mammary gland making glucose a good acceptor substrate for this enzyme. This enables LS to synthesize lactose, the major carbohydrate component of milk. In other tissues, galactosyltransferase transfers galactose onto the N- acetylglucosamine of the oligosaccharide chains in glycoproteins.

Alpha-S2-casein-like A; Important role in the capacity of milk to transport calcium phosphate.

Whey acidic protein; Could be a protease inhibitor. May play an important role in mammary gland development and tissue remodeling.

Glycosylation-dependent cell adhesion molecule 1; Adhesion molecule that accomplishes cell binding by presenting carbohydrate(s) to the lectin domain of L-selectin; Belongs to the PP3/GlyCAM-1 family.

Prolactin; Prolactin acts primarily on the mammary gland by promoting lactation.

Serum albumin; Serum albumin, the main protein of plasma, has a good binding capacity for water, Ca(2+), Na(+), K(+), fatty acids, hormones, bilirubin and drugs. Its main function is the regulation of the colloidal osmotic pressure of blood. Major zinc transporter in plasma, typically binds about 80% of all plasma zinc (By similarity). Major calcium and magnesium transporter in plasma, binds approximately 45% of circulating calcium and magnesium in plasma (By similarity). Potentially has more than two calcium-binding sites and might additionally bind calcium in a non-specific manner (B [...]

Prolactin-5A1.

Alpha-S2-casein-like B; Important role in the capacity of milk to transport calcium phosphate.