| Summary: | Studies are reported on the structure of triglycerides from the intestinal lymph of fasted rats grown from weaning to 4 months of age on a fat-free diet or on diets containing lard or corn oil. Experiments are also reported on the incorporation of dietary palmitic-1-C14, oleic-1-C14, and linolenic acids and of tripentadecanoin into the triglycerides of the intestinal lymph of animals in the above groups. These studies show that the distribution of the fatty acids among the triglycerides synthesized in the intestinal mucosa does not conform to a random pattern.The composition of endogenous lipid (determined by the prolonged feeding period) was found to influence both the relative extent of incorporation of fatty acids into triglycerides or phospholipids, and also the resynthesis of different fatty acids into triglycerides.Linoleic acid was predominantly in the Β-position of triglycerides of which it was a constituent, and palmitic acid was predominantly in the Β-position in triglycerides containing fatty acids other than linoleic acid.
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