label: 5-methyluridine(54) in tRNA + (6S)-5,6,7,8-tetrahydrofolate + NADP(+) => uridine(54) in tRNA + (6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + NADPH + H(+)
label_lc: 5-methyluridine(54) in trna + (6s)-5,6,7,8-tetrahydrofolate + nadp(+) => uridine(54) in trna + (6r)-5,10-methylene-5,6,7,8-tetrahydrofolate + nadph + h(+)