Absence of a - casein protein significantly curtails secretion of other milk proteins and calcium - phosphate ,
In contrast , secretion of albumin , <*> into milk is not reduced .
Absence of a - casein protein significantly curtails secretion of other milk proteins and calcium - phosphate , suggesting a role for a - casein in the establishment of casein micelles .
In contrast , secretion of albumin , which is not synthesized in the mammary epithelium , into milk is not reduced .