Reaction catalyzed by dihydroflavonol 4-reductase (1.1.1.219)
+
NADP+
=
+
NADPH
+
a (2R,3S,4S)-leucoanthocyanidin
+
NADP+
=
a (2R,3R)-dihydroflavonol
+
NADPH
+
H+
