title: Hyper-repressible operator-type mutant in sulphate permease gene of Aspergillus nidulans.
mesh_terms: D001233:Aspergillus nidulans; D004794:Enzyme Repression; D005809:Genes, Regulator; D026901:Membrane Transport Proteins / Q000096:biosynthesis; D008715:Methionine / Q000378:metabolism; D009154:Mutation; D009713:Nucleotidyltransferases / Q000096:biosynthesis; D009876:Operon; D013431:Sulfates / Q000378:metabolism
chemical_list: D026901:Membrane Transport Proteins; D013431:Sulfates; D008715:Methionine; D009713:Nucleotidyltransferases