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(a) Structural illustration of glycerolphospholipid. R1 and R2 can be saturated or unsaturated fatty acids, such as decanoic acid, lauric acid, palmitic acid, oleic acid, myristic acid, stearic acid, and erucic acid. R3 can be phosphatidylcholine (PC), phosphatidyl ethanolamine (PE), phosphatidyl serine (PS), phosphatidyl inositols (PI), phosphatidic acid (PA), phosphatidylglycerol (PG), and cardiolipin; (b) Structure of sphingomyelin. (c) Structure of cholesterol.
