D-cysteine(in) + L-alanine(out) => D-cysteine(out) + L-alanine(in)
d-cysteine(in) + l-alanine(out) => d-cysteine(out) + l-alanine(in)
D-cysteine(in) + L-alanine(out) => D-cysteine(out) + L-alanine(in)
d-cysteine(in) + l-alanine(out) => d-cysteine(out) + l-alanine(in)