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Journal of Dairy Science Vol. 36 No. 8 859-864
© 1953 by American Dairy Science Association ®
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The Essential Amino Acid Content of the Proteins Isolated from Milk of the Cow, Ewe, Sow, and Mare1

B. C. Ray Sarkar2, Alice J. Rykala and C. W. Duncan

Department of Agricultural Chemistry, Michigan State College, East Lansing

ABSTRACT

With the recognition of the dietary indispensability of certain amino acids, the determination of the amino acid content of milk proteins has assumed unusual importance. For obvious reasons, principal attention has been given to the study of the chemical composition of bovine milk, whereas in other species of mammals attention has been directed toward the determination of total solids, fat, total protein, milk sugar, and ash (3, 4, 10, 11, 12, 13). Some systematic work has been done on the component fatty acids of milk fat from a few species of animals (10), but, with the exception of the cow, there is only fragmentary information concerning the amino acid composition of the milk proteins of domestic animals. Recently, work has been reported on the nitrogen distribution (18) and the vitamin content of colostrum and milk of the sow (6, 9, 15).

In view of the paucity of information concerning the amino acid content of proteins of milk from some of the common species of mammals, a study was initiated to determine the essential amino acid content of the mixed proteins isolated from milk of the cow, ewe, sow, and mare.

FOOTNOTES

1 Published with the approval of the Director of the Michigan Agricultural Experiment Station as Journal article No. 1476.

2 Present adress: Defense Science Organization, New Delhi, India.






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Copyright © 1953 by the American Dairy Science Association ®.