PR:P22288 rGCH1 GTP cyclohydrolase 1 (rat) rGCH1|GTP cyclohydrolase I (rat)|GTP-CH-I (rat) PR:000000001 NCBITaxon:10116 RGD:61992 UniProtKB:P22288 PR:P22288-1 rGCH1/iso:1 GTP cyclohydrolase 1 isoform 1 (rat) rGCH1/iso:1 PR:000000001 NCBITaxon:10116 RGD:61992 PR:P22288 UniProtKB:P22288-1