Probably involved in the uptake of galactarate and/or D-glucarate. galactarate(in) + H(+)(in) = galactarate(out) + H(+)(out) D-glucarate(in) + H(+)(in) = D-glucarate(out) + H(+)(out) Belongs to the major facilitator superfamily. Phthalate permease family.