GCH1 GI:66932968 GTP cyclohydrolase 1 isoform 1 1 mekgpvrapa ekprgarcsn gfperdpprp gpsrpaekpp rpeaksaqpa 50 51 dgwkgerprs eednelnlpn laaayssils slgenpqrqg llktpwraas 100 101 amqfftkgyq etisdvlnda ifdedhdemv ivkdidmfsm cehhlvpfvg 150 151 kvhigylpnk qvlglsklar iveiysrrlq vqerltkqia vaitealrpa 200 201 gvgvvveath mcmvmrgvqk mnsktvtstm lgvfredpkt reefltlirs 250