Reaction catalyzed by 6,7-dimethyl-8-ribityllumazine synthase (2.5.1.78)
+
=
+
2
H2O
+
5-amino-6-ribitylamino-2,4-(1H,3H)-pyrimidinedione
+
3,4-dihydroxy-2-butanone 4-phosphate
=
6,7-dimethyl-8-ribityllumazine
+
2 H2O
+
phosphate
