Abstract
RBC (red blood cell) membrane fatty acid percentages in PE (phosphatidylethanolamine) and PC (phosphatidylcholine) in different species like rats, rabbits, humans and dogs were measured and compared. The major fatty acids of membrane PE and PC in the species were same as C16:0, C18:1,, C18:1, C18:2and C20:4. SFAs (Saturatedfatty acids) (C16:0, C18:0, and C20:0) were lower in PE but higher in PC in all species in RBC membrane. Arachidonate (C20:4 ) and PUFAs (polyunsaturated fatty acid) (C18:2, C18:3 and C20:4) were higher in PE than PC. PC also had relatively high PUFA content. C20:4 was a prominent fatty acid of PE in rat, human and dog except rabbit. C18:22 was the prominent fatty acid in the rabbit. MUFA (monounsaturated fatty acid) (C16:1,C18:1 C18:1, C20:1 and C22:1) percentage was also higher in PE than PC. C18:1 was found considerably higher than C16:1 in all species. LCPUFAs (long chain polyunsaturated fatty acids) (C22:4, and C22:6 were significantly lower in the species PE and PC. Among LCPUFA, C22:6 was high in human RBC membrane PE and was not detected in dog