上泽充通大学 Shanghai Jiao Tong University 3.5.3 Membrane strengthening Agents:Sterols and Hopanoids固醇与藿烷类化合物 The eukayotes have sterols in their membranes.真核细胞膜上有固醇 Sterols are absent from the membranes of virtually all prokaryotes (except methanotrophic bacteria and the mycoplasmas)原核生物细胞 膜中无固醇（除嗜甲烷细菌及支原体之外） Depending on the cell type,sterols can make up from 5 to 25%of the total lipids of eukaryotic membranes.固醇可达到真核细胞膜总脂量的5- 25%. Shanghal Jlao Tona UniversttyShanghai Jiao Tong University 3.5.3 Membrane strengthening Agents: Sterols and Hopanoids 固醇与藿烷类化合物 The eukayotes have sterols in their membranes.真核细胞膜上有固醇. Sterols are absent from the membranes of virtually all prokaryotes (except methanotrophic bacteria and the mycoplasmas) 原核生物细胞 膜中无固醇(除嗜甲烷细菌及支原体之外) Depending on the cell type, sterols can make up from 5 to 25% of the total lipids of eukaryotic membranes. 固醇可达到真核细胞膜总脂量的5- 25%