D-galactose(out) + H(+)(out) => D-galactose(in) + H(+)(in)
d-galactose(out) + h(+)(out) => d-galactose(in) + h(+)(in)
D-galactose(out) + H(+)(out) => D-galactose(in) + H(+)(in)
d-galactose(out) + h(+)(out) => d-galactose(in) + h(+)(in)