choline(in) + H(+)(in) => choline(out) + H(+)(out)
choline(in) + h(+)(in) => choline(out) + h(+)(out)
choline(in) + H(+)(in) => choline(out) + H(+)(out)
choline(in) + h(+)(in) => choline(out) + h(+)(out)