The difference between the two nucleotide-free (apo) structures is the ≈30° pivot of TM4/TM5 helices relative to the TM3/TM6 helices.
Razlika između dve strukture bez nukleotida (apo) je ~30° pomeranje TM4/TM5 heliksa relativno na TM3/TM6 helikse.