1. The labelled phosphate and cytidine-diphosphate esters of choline and ethanolamine, together with their bases, were incubated with rat liver homogenate and microsomal membranes, and the transfer of radioactivity into water-soluble and lipid components examined. 2. Very little conversion of choline into betaine and phosphorylcholine, and of ethanolamine into phosphorylethanolamine, as well as into their intermediates and lipid material, was observed in both preparations. 3. Small transfer of phosphorylcholine to cytidine-diphosphate choline and to lecithin, and of phosphorylethanolamine to cytidine-diphosphate ethanolamine and phosphatidylethanolamine was observed. 4. Despite a considerable breakdown to hydrosoluble products, the two cytidinediphosphate esters were noticeably converted into corresponding phospholipid with both homogenate and microsomes.
File in questo prodotto:
Non ci sono file associati a questo prodotto.