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Journal of Dairy Science Vol. 46 No. 9 941-946
© 1963 by American Dairy Science Association ®
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Chemical Composition of Sheep Mammary Gland

Joel Bitman, Helene C. Cecil, D. R. Gilliam and T. R. Wrenn

Dairy Cattle Research Branch, USDA, Beltsville, Maryland

ABSTRACT

The chemical composition of nonlactating mammary gland was studied in both young and mature sheep under differing ovarian hormonal conditions. Total mammary gland weight, water, fat, Na, Cl, K, DNA, RNA, histamine, and glycogen were determined in mammary gland tissue from estrous, luteal, and ovariectomized sheep. Endocrine status had little effect upon the concentration of these constituents, but significant differences in composition were found between young and mature mammary gland tissue. The mammary glands from older animals were about 50% larger than those of young sheep. Water content was about 4% higher and the amount of fat was considerably greater in the young animals, being 27% as compared weight.






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Copyright © 1963 by the American Dairy Science Association ®.