Colistin sulfate A Polymyxin potent antibiotic and apoptosis inducer. This compound induces apoptosis through interaction with the cytoplasmic membrane. Colistin is a key microbiological component in Colistin Oxolinic Acid Blood Agar utilized in the cultivation of Aminobacter aminovorans, Bacillus species, Hyphomicrobium species and Methylobacterium species. It is also a critical component is VCN Inhibitor & VCNT Inhibitor growth media used in the isolation of Neisseria species.