Bacitracin is a polypeptide antibiotic that is chemically unrelated to neomycin. It inhibits bacterial cell wall synthesis. It is produced by Bacillus subtilis (Gehrig & Warshaw, 2008).

Colistin (as sulfate) 3mg, neomycin (as sulfate) 3.3mg, hydrocortisone acetate 10mg, thonzonium bromide 0.5mg; per mL; otic susp; contains thimerosal. Colistin sulfate is a polypeptide antibiotic ...

Polymyxin B sulfate 10000Units, neomycin sulfate 3.5mg, hydrocortisone 10mg; per mL. Colistin sulfate is a polypeptide antibiotic which penetrates into and disrupts the bacterial cell membrane.

and the action of natural polypeptide toxins and some peptide antibiotics. Depending on specific circumstances, adoption of hydrophobic or amphipathic helical structure on binding to the membrane ...