Fig. 2
a Force–distance curves obtained by using a soft-type cantilever for the A-band regions of single myofibrils in a rigor, b contracting, c (+)AMPPNP, and d relaxed states. b Force–distance curves obtained by using a hard type cantilever for the A-band regions of single myofibrils in a rigor and b relaxed states. Solid lines represent the first measurement and a dotted line the second. The origin of the abscissa is the position of the cantilever at the surface of the cover slip. Arrows, the tip of the cantilever just made contact with the surface of the myofibrils. Asterisk force versus distance curves for the cover slip