label: 5,10-methylenetetrahydromethanopterin + NAD(+) <=> 5,10-methenyl-5,6,7,8-tetrahydromethanopterin + NADH
label_lc: 5,10-methylenetetrahydromethanopterin + nad(+) <=> 5,10-methenyl-5,6,7,8-tetrahydromethanopterin + nadh