both the cholesterol/phospholipid ratio and the relative proportions of phosphatidylethanolamine ( kephalin ) , phosphatidylinositol and phosphatidylserine were about the same in both membranes , whereas phosphatidylcholine ( lecithin ) and sphingomyelin showed somewhat higher values in the membranes of the 5-hydroxytryptamine organelles .
C1959616
phosphatidylcholine
C0031617
lecithin