Figure 1.
Descriptive and chemical structure of colistin. (A) Descriptive structure of colistin [*Fatty acid: (S)-6-methyloctanoic acid for colistin A, (S)-6-methylheptanoic acid for colistin B; Thr threonine, Leu leucine, Dab α,γ-diaminobutyric acid]. (B) Chemical structure of colistin.