title: Mutants of Aspergillus nidulans impaired in penicillin biosynthesis.
mesh_terms: D001233:Aspergillus nidulans / Q000378:metabolism*; D001412:Bacillus subtilis; D001681:Biological Assay; D003037:Cobalt Radioisotopes; D005816:Genetic Complementation Test; D008698:Mesylates; D008730:Methoxsalen; D009153:Mutagens; D009154:Mutation; D009604:Nitrosoguanidines; D009608:Nitrous Acid; D010406:Penicillins / Q000032:analysis / Q000096:biosynthesis*; D014466:Ultraviolet Rays
chemical_list: D003037:Cobalt Radioisotopes; D008698:Mesylates; D009153:Mutagens; D009604:Nitrosoguanidines; D010406:Penicillins; D009608:Nitrous Acid; D008730:Methoxsalen