D-galactonate + H(+) => D-galactono-1,5-lactone + H2O
d-galactonate + h(+) => d-galactono-1,5-lactone + h2o
D-galactonate + H(+) => D-galactono-1,5-lactone + H2O
d-galactonate + h(+) => d-galactono-1,5-lactone + h2o