http://purl.uniprot.org/unirules/MF_01277#construct-template-42 | http://spinrdf.org/sp#object | "Is the main repressor of the genes involved in the de novo synthesis of purine nucleotides, regulating purB, purC, purEK, purF, purHD, purL, purMN and guaBA expression. PurR is allosterically activated to bind its cognate DNA by binding the purine corepressors, hypoxanthine or guanine, thereby effecting transcription repression."xsd:string |