ADP(out) + phosphate(in) + H(+)(out) <=> ADP(in) + phosphate(out) + H(+)(in)
adp(out) + phosphate(in) + h(+)(out) <=> adp(in) + phosphate(out) + h(+)(in)
ADP(out) + phosphate(in) + H(+)(out) <=> ADP(in) + phosphate(out) + H(+)(in)
adp(out) + phosphate(in) + h(+)(out) <=> adp(in) + phosphate(out) + h(+)(in)