短杆菌肽A,15个疏水氨基 酸构成,2分子形成一跨膜 通道,有选择的使单价阳离 子如H+、Na+、K+按化学梯 度通过。 Formyl-L-Val-Gly-L-Ala-D-Leu-L-Ala- -D-Val-L-Val-D-Val-L-Trp-D-Leu-L-Trp- -D-Leu-L-Trp-D-Leu-L-Trp-ethanolamine Gramicidin a an antibiotic that acts as an ion pore. •短杆菌肽A,15个疏水氨基 酸构成,2分子形成一跨膜 通道,有选择的使单价阳离 子如H+、Na+、K+按化学梯 度通过。 Gramicidin A an antibiotic that acts as an ion pore