Kappa-casein stabilizes micelle formation, preventing casein precipitation in milk. Casoxins A, B and C have opioid antagonist activity. Casoxin C causes biphasic ileal contractions through the binding to the complement C3a receptors. Casoplatelin inhibits platelet aggregation. Monomer or homomultimer; disulfide-linked. Mammary gland specific. Secreted in milk. The sequence shown is the A variant. Belongs to the kappa-casein family. Of buttons, digestion and glue - Issue 16 of November 2001