methylenetetrahydrofolate dehydrogenase (NAD+) activity methylenetetrahydrofolate dehydrogenase (NADP+) activity methylenetetrahydrofolate reductase [NAD(P)H] activity obsolete 5,10-methylenetetrahydrofolate oxidation true 5,10-methylenetetrahydrofolate oxidation This term was made obsolete because it is defined as a function term and is in the process ontology. OBSOLETE. This term was not defined before being made obsolete. GO:0006133 biological_process methylenetetrahydrofolate reductase (ferredoxin) activity