多粘菌素B九肽(TFA盐)是一种阳离子环肽。多粘菌素B九肽(TFA盐)是经酶裂解 Polymyxin B 而产生的衍生物,与 Polymyxin B 相比,多粘菌素B九肽(TFA盐)毒性低,缺乏杀菌活性,仍具有破坏革兰氏阴性菌外膜的能力。
Polymyxin B nonapeptide TFA is a cyclic peptide obtained from Polymyxin B by proteolytic removal of its terminal amino acyl residue. Polymyxin B nonapeptide TFA is less toxic, lacks bactericidal activity, and retains its ability to render gram-negative bacteria susceptible to several antibiotics by permeabilizing their outer membranes.