melibiose(in) + Na(+)(in) = melibiose(out) + Na(+)(out)
melibiose(in) + na(+)(in) = melibiose(out) + na(+)(out)
melibiose(in) + Na(+)(in) = melibiose(out) + Na(+)(out)
melibiose(in) + na(+)(in) = melibiose(out) + na(+)(out)