taurocholate(out) + n H(+)(out) = taurocholate(in) + n H(+)(in)
taurocholate(out) + n h(+)(out) = taurocholate(in) + n h(+)(in)
taurocholate(out) + n H(+)(out) = taurocholate(in) + n H(+)(in)
taurocholate(out) + n h(+)(out) = taurocholate(in) + n h(+)(in)