preferred_name: L-cysteine(in) + L-arginine(out) => L-cysteine(out) + L-arginine(in)
preferred_name_lc: l-cysteine(in) + l-arginine(out) => l-cysteine(out) + l-arginine(in)
label: L-cysteine(in) + L-arginine(out) => L-cysteine(out) + L-arginine(in)
label_lc: l-cysteine(in) + l-arginine(out) => l-cysteine(out) + l-arginine(in)