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