label: 6,7-dimethyl-8-ribityllumazine synthase activity
label_lc: 6,7-dimethyl-8-ribityllumazine synthase activity
description: "Catalysis of the reaction: 3,4-dihydroxy-2-butanone-4-phosphate + 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione = 6,7-dimethyl-8-ribityllumazine + phosphate."