3 Li(+)(out) + Ca(2+)(in) = 3 Li(+)(in) + Ca(2+)(out)
3 li(+)(out) + ca(2+)(in) = 3 li(+)(in) + ca(2+)(out)
3 Li(+)(out) + Ca(2+)(in) = 3 Li(+)(in) + Ca(2+)(out)
3 li(+)(out) + ca(2+)(in) = 3 li(+)(in) + ca(2+)(out)