Compound as reactive (1)
D-galactaro-1,4-lactone → 5-dehydro-4-deoxy-D-glucarate + H+
Compound as product (1)
D-galactaro-1,5-lactone → D-galactaro-1,4-lactone
Reversible reaction (1)
D-galactaro-1,4-lactone + H2O ↔ H+ + D-galactarate