5,6,7,8-tetrahydropteridine + NADP(+) = 6,7-dihydropteridine + NADPH + H(+)
5,6,7,8-tetrahydropteridine + nadp(+) = 6,7-dihydropteridine + nadph + h(+)
5,6,7,8-tetrahydropteridine + NADP(+) = 6,7-dihydropteridine + NADPH + H(+)
5,6,7,8-tetrahydropteridine + nadp(+) = 6,7-dihydropteridine + nadph + h(+)