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Central Research Laboratory, Morinaga Milk Industry Company, Ltd., Tokyo, Japan
ABSTRACT
Acrylamide gel electrophoresis patterns and amino acid compositions of human colostral, transitional milk, and mature milk caseins were analyzed.
The full six-band pattern in acrylamide gel urea electrophoresis was observed in mature milk casein, but not in colostral and transitional milk caseins.
Colostral casein contained more aspartic acid, glycine, alanine, cystine, arginine, and tryptophan and less glutamic acid, proline, leucine, and lysine than did mature milk casein.
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