keto-D-tagaturonate + NADH + H(+) => L-galactonate + NAD(+)
keto-d-tagaturonate + nadh + h(+) => l-galactonate + nad(+)
keto-D-tagaturonate + NADH + H(+) => L-galactonate + NAD(+)
keto-d-tagaturonate + nadh + h(+) => l-galactonate + nad(+)