Talk about the protein organization inside the bands.

Each half-band A comprises the heads and tails of the thick filaments whereas the H zone consists solely of tails. M line includes myomesin which connects the thick filaments to each other Each I band contains fine actin myofilaments with troponin and tropomyosin molecules, it is divided transversely into two parts by the very dense Z line. Fine filaments extend on both sides of Z line over the entire length of the I band and the Z line composed of alpha actinin is thus the attachment point of these fine filaments.