2.7.6.3	2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase	6-hydroxymethyl-dihydropterin diphosphate biosynthesis V (Pyrococcus)	
3.1.4.56	7,8-dihydroneopterin 2',3'-cyclic phosphate phosphodiesterase	6-hydroxymethyl-dihydropterin diphosphate biosynthesis V (Pyrococcus)	
3.5.4.39	GTP cyclohydrolase IV	6-hydroxymethyl-dihydropterin diphosphate biosynthesis V (Pyrococcus)	
4.1.2.59	dihydroneopterin phosphate aldolase	6-hydroxymethyl-dihydropterin diphosphate biosynthesis V (Pyrococcus)