Folic acid

bifunctional folylpolyglutamate synthase and dihydrofolate synthase (RefSeq)

para-aminobenzoate synthase component I (ADC synthase) (RefSeq)

GTP cyclohydrolase I (RefSeq)

7,8-dihydropteroate synthase (dihydropteroate synthase (DHPS), dihydropteroate pyrophosphorylase) (RefSeq)

dihydroneopterin aldolase (RefSeq)

2-amino-4-hydroxy-6- hydroxymethyldihydropteridine pyrophosphokinase (7,8-dihydro-6-hydroxymethylpterin-pyrophosphokinase, 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase, PPPK) (RefSeq)