J. Anim Sci.
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J. Anim Sci. 1986. 63:1119-1125.
© 1986 American Society of Animal Science
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Acetyl-CoA Carboxylase of Sheep Adipose Tissue: Problems of the Assay and Adaptation During Fetal Development

R. G. Vernon and Eleanor Taylor

Hannah Research Institute1, Ayr, KA6 5HL, United Kingdom

Abstract

The rate of fatty acid synthesis of perirenal adipose tissue of fetal lambs decreased by 90% during the last month of gestation. There was also a 90% decrease in the activity of fatty acid synthetase during this period, but the activity of this enzyme exceeded lipogenic flux by a factor of 10. The activity of acetyl CoA carboxylase in the active state (initial activity) was very similar to the lipogenic flux in adipose tissue from lambs at 120 d of gestation; although activity decreased towards term, the decline was insufficient to account for the fall in rate of fatty acid synthesis. The study also shows that assay of acetyl CoA carboxylase in the active state of ovine adipose tissue and of caprine mammary gland requires the presence of citrate, thus differing from that for rat adipose tissue. Evidence that pyruvate carboxylase can interfere in the assay of acetyl CoA carboxylase also is presented.

Footnotes

1 Lactational Physiol. Biochem. Dept.




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Copyright © 1986 by the American Society of Animal Science.