图1. 正常GPI锚连蛋白与GPI锚关系结构示意图。GPI锚由磷脂酰肌醇（PI）和一个N-葡萄糖胺分子（GlcNH2）、三个甘露糖（Man）和一个乙醇胺分子（EtN）组成，末端甘露糖上的乙醇胺通过酰胺键共价结合锚连蛋白.
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