Methenyltetrahydrofolate cyclohydrolase Catalyzes the oxidation of 5,10- methylenetetrahydrofolate to 5,10-methenyltetrahydrofolate and then the hydrolysis of 5,10-methenyltetrahydrofolate to 10- formyltetrahydrofolate (By similarity). Methylenetetrahydrofolate dehydrogenase Bifunctional protein FolD 306 MVAHAATCLDGKSLAQSIERQLADHVRTFQAQWGRSPGLAVLRVGNDPASAVYVRAKEQACSRVGIQSFGAHLPATITEAALLAKITELNQDERVDGILLQLPLPPHLDPRPLLYAIHPDKDVDGLHPENLGRLVRDEPGLRSCTPAGVMQLLAAYGIDVVGRSAVVVGRSILVGKPLALMLLSANATVTIAHSRSRELASITRSAEILVTAMGQPRRITADMIRPGAVVIDVGINRIQRPDGKSSLWGDVDYEAARAVASYITPVPGGVGPMTVAMLLHNTVWSYCRRHNWQQPLLSLTSMPPAP FOLD_THEEB folD tll0021