title: A genetic approach to the biosynthesis of the rifamycin-chromophore in Nocardia mediterranei. V. Studies on the biogenetic origin of 3-substituents.
mesh_terms: D009154:Mutation; D009615:Nocardia / Q000235:genetics / Q000378:metabolism*; D012294:Rifamycins / Q000096:biosynthesis*
chemical_list: D012294:Rifamycins