GO:0008703

5-amino-6-(5-phosphoribosylamino)uracil reductase activity

Details: 
Catalysis of the reaction: 5-amino-6-(5-phosphoribitylamino)uracil + NADP(+) = 5-amino-6-(5-phosphoribosylamino)uracil + H(+) + NADPH.
GO Category: 
MF
RibD