homoserine lactone(in) + H(+)(out) => homoserine lactone(out) + H(+)(in)
homoserine lactone(in) + h(+)(out) => homoserine lactone(out) + h(+)(in)
homoserine lactone(in) + H(+)(out) => homoserine lactone(out) + H(+)(in)
homoserine lactone(in) + h(+)(out) => homoserine lactone(out) + h(+)(in)