Compound as reactive (1)
D-galactopyranose + an oxidized unknown electron carrier → 3-dehydro-D-galactopyranose + a reduced unknown two electron carrier
Compound as product (2)
α-D-galactose 1-phosphate + H2O → D-galactopyranose + phosphate
D-galactopyranose + NADP+ ← NADPH + H+ + 3-keto-β-D-galactose
Reversible reaction (2)
D-galactopyranose + NAD(P)+ ↔ D-galactono-1,5-lactone + NAD(P)H + H+
D-galactopyranose + NADP+ ↔ D-galactono-1,5-lactone + NADPH + H+