(R)-lipoate(out) + 2 Na(+)(out) = (R)-lipoate(in) + 2 Na(+)(in)
(r)-lipoate(out) + 2 na(+)(out) = (r)-lipoate(in) + 2 na(+)(in)
(R)-lipoate(out) + 2 Na(+)(out) = (R)-lipoate(in) + 2 Na(+)(in)
(r)-lipoate(out) + 2 na(+)(out) = (r)-lipoate(in) + 2 na(+)(in)