Enzymatic Activities in Mammary Glands of Several Species
Open Access
- 1 December 1966
- journal article
- research article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 49 (12), 1533-1542
- https://doi.org/10.3168/jds.s0022-0302(66)88132-8
Abstract
The activities of a number of enzymes in the pathways of energy metabolism and lactose, fat and protein biosynthesis, and DNA levels in guinea pig and cow mammary glands at various stages of pregnancy and lactation, and in sow, mouse, and rabbit mammary glands at full lactation were determined. Large increases in enzyme activities and in DNA levels occurred during early lactation in guinea pig mammary glands but not in cow mammary glands. The significant apparent species differences in enzyme activities observed may have been due to interspecies differences in rates of secretory cell proliferation, in the compositions of the mammary gland samples, or in the inherent nature of the regulatory mechanisms associated with the initiation of lactation. Enzyme levels did not appear to be related to interspecies differences in milk composition.This publication has 8 references indexed in Scilit:
- Rat Mammary Gland Composition During Pregnancy and LactationJournal of Dairy Science, 1965
- Hormone-dependent differentiation of mammary gland in vitro.Proceedings of the National Academy of Sciences of the United States of America, 1965
- Quantitative studies on mammary-gland enzymes involved in lactose synthesisBiochemical Journal, 1961
- Carbohydrate metabolism of mammary tissuf: I. Pathways of glucose catabolism in the mammary glandBiochimica et Biophysica Acta, 1958
- Studies on the particulate components of rat mammary gland. 2. Changes in the levels of the nucleic acids of the mammary glands of rats during pregnancy, lactation and mammary involutionBiochemical Journal, 1957