title: Analysis of merodiploids of the cysB region in Salmonella typhimurium.
mesh_terms: D003545:Cysteine / Q000096:biosynthesis* / Q000494:pharmacology; D004171:Diploidy; D004798:Enzymes / Q000235:genetics*; D005799:Genes, Dominant; D005809:Genes, Regulator; D006579:Heterozygote; D012486:Salmonella typhimurium / Q000235:genetics*
chemical_list: D004798:Enzymes; D003545:Cysteine