Polymyxin B nonapeptide acetate(86408-36-8 free base) 是一种阳离子环肽。 Polyxin B 九肽是 polyxin B 经酶解产生的衍生物。与 polyxin B 相比,polyxin B 九肽毒性低,缺乏杀菌活性,仍具有破坏革兰氏阴性菌外膜的能力。
β-amyloid (15-21) is a fragment of Amyloid-β peptide, maybe used in the research of neurological disease. This fragment is involved in beta sheet formation.