3.6.1.67 7,8-dihydroneopterin 3'-triphosphate + H2O - 3.6.1.67 7,8-dihydroneopterin 3'-triphosphate + H2O committed step of folate synthesis in bacteria 3.6.1.67 7,8-dihydroneopterin 3'-triphosphate + H2O the second step in the pterin branch of the folate synthesis pathway 3.6.1.67 7,8-dihydroneopterin 3'-triphosphate + H2O key enzyme in the folate pathway 3.6.1.67 7,8-dihydroneopterin 3'-triphosphate + H2O the enzyme participates in a folate biosynthesis pathway