Table 10-1 Approximate Lipid Compositions of Different Cell Membranes Percentage of Total Lipid by Weight ewseld aueiqwaw IaAIT ewseld Io]no pue iauu!) (saueiqwaw wnjnonag 意 Lipid Cholesterol 17 23 22 3 6 0 Phosphatidyl- ethanolamine 7 18 15 35 17 70 Phosphatidylserine 4 7 9 2 5 trace Phosphatidyl- choline 24 17 10 39 40 0 Sphingomyelin 19 18 8 0 5 0 Glycolipids 7 3 28 trace trace 0 Others 22 13 8 21 27 30