title: The origin of methyl groups of 4'-depropyl-4'-ethyllincomycin (U-21699).
mesh_terms: D001673:Biodegradation, Environmental; D002250:Carbon Radioisotopes; D003653:Decarboxylation; D005285:Fermentation; D008034:Lincomycin / Q000096:biosynthesis* / Q000302:isolation & purification; D010084:Oxidation-Reduction; D013302:Streptomyces / Q000378:metabolism
chemical_list: D002250:Carbon Radioisotopes; D008034:Lincomycin