Effect of Source of Dietary Protein on the Unsaturated Fatty Acids in the Carcass Fat of the Rat

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Abstract
The unsaturated fatty acid composition of the dietary fat is the primary factor affecting the fatty acid composition of the depot fat of the rat. Replacement of the purified protein in the diet of rats with either ether-extracted soybean meal or ether-extracted cottonseed meal results in an increase in the level of diethenoid acids and a decrease in the level of monoethenoid acids in the carcass fat. These effects apparently are not the result of residual plant oils in the meals. Evidence presented indicates that soybean and cottonseed meals contain a factor (or factors?) capable of altering the metabolism of unsaturated fatty acids in the rat.

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