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(+)