Colistin sulphate;硫酸粘杆菌素;1264-72-8 Formula:C53H102N16O17S Colistin sulfate (Belcomycin; Polymixin E), originally isolated from B. polymyxa, is a polypeptide antibiotic and apoptosis inducer, also acts as a NADH quinone oxidoreductase inhibitor.It inhibits gram-negative bacteria by binding to lipopolysaccharides and phospholipids in the outer cell membrane of gram-negative bacteria.