Reaction catalyzed by tRNA-dihydrouridine20a/20b synthase [NAD(P)+] (1.3.1.90)
5,6-dihydrouracil20b in tRNA
+
NAD(P)+
=
uracil20b in tRNA
+
NAD(P)H
+
5,6-dihydrouracil20b in tRNA
+
NAD(P)+
=
uracil20b in tRNA
+
NAD(P)H
+
H+
