title: Simplicity of mammalian regulatory systems.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002454:Cell Differentiation; D004247:DNA; D004790:Enzyme Induction; D004926:Escherichia coli; D005796:Genes; D005809:Genes, Regulator; D006801:Humans; D006822:Hybrid Cells; D008322:Mammals; D009154:Mutation; D009876:Operon; D010641:Phenotype; D014176:Protein Biosynthesis; D012313:RNA; D012641:Selection, Genetic; D012727:Sex Characteristics; D013489:Suppression, Genetic; D013739:Testosterone
chemical_list: D013739:Testosterone; D012313:RNA; D004247:DNA