Reaction catalyzed by 6,7-dihydropteridine reductase (1.5.1.34)
quinonoid 6,7-dimethyl-7,8-dihydropteridine
+
NADH
+
=
+
NAD+
quinonoid 6,7-dimethyl-7,8-dihydropteridine
+
NADH
+
H+
=
6,7-dimethyl-5,6,7,8-tetrahydropteridine
+
NAD+
