cell membrane internal membrane plasma membrane biomembrane unit membrane
细胞膜Cell Membrane /plasma membrane
化学成分 脂类/蛋白质/糖类 和膜的结构与功能相对应,膜的化学成
分的比例可出现较大差异
生物膜
biological membrane
不同的生物膜功能不同,但化学组成、分子 结构类似。
Cell Membrane : The outer boundary of the cell. The cell membrane helps control what substances enter or exit the cell.
细胞膜功能的主要承担者 以不同方式与脂双层结合
蛋白质
整合蛋白 (Integral proteins):
penetrate or are embedded in the phospholipid bilayer. some membrane proteins have one or more alpha-helical regions that can span the bilayer multiple times.
single-pass transmembrane prot. multipass transmembrane prot.
蛋白质
边周蛋白 (Peripheral proteins):
linked only at the cytoplasmic surface by attachment to a fatty acid chain, or at the external cell surface by bound to other membrane proteins.