D-arabinose 1-dehydrogenase (NADP+) activity
d-arabinose 1-dehydrogenase (nadp+) activity
D-arabinose + NADP(+) = D-arabinono-1,4-lactone + NADPH + H(+)
d-arabinose + nadp(+) = d-arabinono-1,4-lactone + nadph + h(+)