Colistin A

• CAT Number: R021210
• CAS Number: 7722-44-3
• Molecular Formula: C53H100N16O13 xH2SO4 (lot specific)
• Purity: ≥95%
• Synonyms: Polymixin E1; 1,4,7,10,13,16,19-Heptaazacyclotricosane Cyclic peptide deriv.; Colistin IV; N2-(6-Methyl-1-oxooctyl)-L-2,4-diaminobutanoyl-L-threonyl-L-2,4-diaminobutanoyl-L-2,4-diaminobutanoyl-L-2,4-diaminobutanoyl-D-leucyl-L-leucyl-L-2,4-diaminobuta
• Storage: -80°C

Polymyxin E1 sulfate or colistin A is one of the two major components of polymyxin E (colistin). Polymyxin E1 and E2 are structurally similar and differ only by a fatty acid group at the N-terminus. Polymyxin E1 contains 6-methyloctanoic acid and polymyxin E2 (colistin B) contains 6-methylheptanoic acid. Together, polymyxin E1 and E2 comprise approximately 85% of polymyxin E; however, 13 different polymyxin E components have been indentified.

Reference

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