. "Catalysis of the reaction: CDP-diacylglycerol + L-serine = CMP + O-sn-phosphatidyl-L-serine." . . "CDP-diacylglycerol-serine O-phosphatidyltransferase activity" . "CDP-diacylglycerol-L-serine O-phosphatidyltransferase activity" . "CDP-diacylglycerol:L-serine 3-O-phosphatidyltransferase activity" . "CDP-diglyceride-L-serine phosphatidyltransferase activity" . "CDP-diglyceride:serine phosphatidyltransferase activity" . "CDP-diglycerine-serine O-phosphatidyltransferase activity" . "CDPdiacylglycerol-serine O-phosphatidyltransferase activity" . "CDPdiglyceride-serine O-phosphatidyltransferase activity" . "cytidine 5'-diphospho-1,2-diacyl-sn-glycerol (CDPdiglyceride):L-serine O-phosphatidyltransferase activity" . "cytidine 5'-diphospho-1,2-diacyl-sn-glycerol:L-serine O-phosphatidyltransferase activity" . "cytidine diphosphoglyceride-serine O-phosphatidyltransferase activity" . "phosphatidylserine synthase activity" . "phosphatidylserine synthetase activity" . "PS synthase activity" . "serine exchange enzyme" . . .