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