these findings and our previous investigations on the topography of seven enzymes of triacylglycerol , phosphatidylcholine and phosphatidylethanolamine biosynthesis ( ballas , l.m . and bell , r.m. , biochim . biophys . acta 602 , ( 1980 ) 578-590 ) indicate that the synthesis of the major cellular glycerolipids occurs asymmetrically on the cytoplasmic surface of the endoplasmic reticulum .
C0010834
cytoplasmic
C0014239
endoplasmic reticulum