title: Modified penicillin enrichment procedure for the selection of bacterial mutants.
abstract: Penicillin enrichment and selection of biochemical mutants was performed on agar plates. With this technique, there is an optimum penicillin exposure time for the greatest yield of a particular auxotroph.
mesh_terms: D000362:Agar; D001120:Arginine / Q000378:metabolism; D001431:Bacteriological Techniques; D002470:Cell Survival; D004926:Escherichia coli / Q000302:isolation & purification* / Q000378:metabolism; D006639:Histidine / Q000378:metabolism; D007532:Isoleucine / Q000378:metabolism; D009153:Mutagens; D009154:Mutation; D009604:Nitrosoguanidines; D010400:Penicillin G; D013696:Temperature
chemical_list: D009153:Mutagens; D009604:Nitrosoguanidines; D007532:Isoleucine; D006639:Histidine; D000362:Agar; D001120:Arginine; D010400:Penicillin G