has part has part has_part has role geroprotector bacitracin A zwitterion bacitracin A mixture of at least nine closely related homodetic cyclic peptides produced by <em>Bacillus subtilis</em> and <em>B. licheniformis</em>, which is particularly active against Gram-positive bacteria. CHEBI:2970 CHEBI:22684 Bacitracin CHEBI:28669 chebi_ontology bacitracins antibacterial agent bacitracin A mixture