KEGG Orthology (KO) [BR:rru00001] 09100 Metabolism 09108 Metabolism of cofactors and vitamins 00790 Folate biosynthesis [PATH:rru00790] Rru_A0271 GTP cyclohydrolase K01495 GCH1; GTP cyclohydrolase IA [EC:3.5.4.16] Enzymes [BR:rru01000] 3. Hydrolases 3.5 Acting on carbon-nitrogen bonds, other than peptide bonds 3.5.4 In cyclic amidines 3.5.4.16 GTP cyclohydrolase I Rru_A0271 GTP cyclohydrolase K01495 GCH1; GTP cyclohydrolase IA [EC:3.5.4.16]