>sp|P30793-4|GCH1_HUMAN GTP cyclohydrolase 1 OS=Homo sapiens GN=GCH1 MEKGPVRAPAEKPRGARCSNGFPERDPPRPGPSRPAEKPPRPEAKSAQPADGWKGERPRS EEDNELNLPNLAAAYSSILSSLGENPQRQGLLKTPWRAASAMQFFTKGYQETISDVLNDA IFDEDHDEMVIVKDIDMFSMCEHHLVPFVGKVHIGYLPNKQVLGLSKLARIVEIYSRRLQ VQERLTKQIAVAITEALRPAGVGVVVEATKSNKYNKGLSPLLSSCHLFVAILK