# OC Root 2nd 3rd 4th PC Gene/Definition OC.166382 Archaea.11195 Crenarchaeota.5730 Metallosphaera.1390 mse.1584 mse:Msed_1611 GTP cyclohydrolase I; K01495 GTP cyclohydrolase IA [EC:3.5.4.16] OC.166382 Archaea.11195 Crenarchaeota.5730 Metallosphaera.1390 mcn.616 mcn:Mcup_0618 GTP cyclohydrolase I; K01495 GTP cyclohydrolase IA [EC:3.5.4.16] OC.166382 Archaea.11195 Crenarchaeota.5730 Metallosphaera.1390 mhk.1898 mhk:DFR87_10650 GTP cyclohydrolase I FolE; K01495 GTP cyclohydrolase IA [EC:3.5.4.16]