(S)-carnitine(out) + Na(+)(out) <=> (S)-carnitine(in) + Na(+)(in)
(s)-carnitine(out) + na(+)(out) <=> (s)-carnitine(in) + na(+)(in)
(S)-carnitine(out) + Na(+)(out) <=> (S)-carnitine(in) + Na(+)(in)
(s)-carnitine(out) + na(+)(out) <=> (s)-carnitine(in) + na(+)(in)