Enzymes [BR:cobs01000]
1. Oxidoreductases
1.5 Acting on the CH-NH group of donors
1.5.1 With NAD+ or NADP+ as acceptor
1.5.1.15 methylenetetrahydrofolate dehydrogenase (NAD+)
139101196
3. Hydrolases
3.5 Acting on carbon-nitrogen bonds, other than peptide bonds
3.5.4 In cyclic amidines
3.5.4.9 methenyltetrahydrofolate cyclohydrolase
139101196
