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Abstract
The following reactions occur in the rat-liver preparations studied, lysolecithin → glycerophosphorylcholine + fatty acid (1) lysolecithin + acyl-CoA → lecithin (2) 2 lysolecithin → lecithin + glycerophosphorylcholine (3) In enzyme systems containing microsomes, lecithin synthesis from lysolecithin occurs primarily by Reaction 2 which is ATP and CoA dependent. In the particlefree cytoplasmic fluid Reaction 1 is predominant. This reaction is not influenced by added ATP or CoA. Triglyceride, diglyceride, phosphatidylethanolamine, inositol phosphatide and cholesterol esters do not act as acyl donors for the esterification of lysolecithin in ratliver homogenates. The formation of lecithin in the microsomal system by Reaction 2 is approx. 6 times greater than the synthesis of lecithin in the cytoplasmic fluid by Reaction 3.
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Schedule a callMore From: Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism
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