title: The correlation between conformation and biological activity of gramicidin S analogs.
mesh_terms: D001412:Bacillus subtilis / Q000187:drug effects; D009905:Optical Rotatory Dispersion; D010455:Peptides / Q000494:pharmacology; D013210:Staphylococcus / Q000187:drug effects; D014449:Tyrothricin / Q000302:isolation & purification* / Q000494:pharmacology*
chemical_list: D010455:Peptides; D014449:Tyrothricin