isoursodeoxycholate 7-beta-dehydrogenase (NAD+) activity
isoursodeoxycholate 7-beta-dehydrogenase (nad+) activity
3beta,7beta-dihydroxy-5beta-cholan-24-oate + NAD(+) = 3beta-hydroxy-7-oxo-5beta-cholan-24-oate + NADH + H(+)
3beta,7beta-dihydroxy-5beta-cholan-24-oate + nad(+) = 3beta-hydroxy-7-oxo-5beta-cholan-24-oate + nadh + h(+)