Abstract
An investigation was carried out into the effects of gonadal hormones and biotin nutrition on the incorporation of 14C-acetate into the liver lipid fractions of female chicks. Results suggest that there is a vast difference in liver lipid metabolism between hormone and non-hormone treated chicks. Biotin deficiency reduced the total incorporation of acetate into liver lipids. All treatment groups showed the same incorporation patterns with time in the case of the liver triglyceride and phospholipid fractions. Evidence suggested that the phospholipids were derived from the triglyceride fraction by some mechanism of trans-esterification. Results also indicate that abnormal synthesis of cholesterol occurs in biotin deficiency, and the possibility exists that the hormone treatment was able to offset the effects of biotin deficiency with respect to cholesterol synthesis. Liveweight gains showed that the hormone treatment considerably improved the growth responses of biotin-deficient chicks over the treatment period studied.
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