the lipids of both membranes contained phosphatidyl glycerophosphate ( 52 % ) and phosphatidyl glycerol ( 3-4 % ) but the sulfated lipid components , glycolipid sulfate and phosphatidyl glycerosulfate , were present exclusively in the purple membrane , the red membrane containing instead two unidentified glycolipids .
C0025249
lipids
C0023779
lipid