assuming that 100 % of the heads are to be attached to actin in rigor , then satisfactory qualitative low-resolution modelling of observed x-ray diffraction data is obtained if the outer ends of these myosin heads can move axially ( total range about 200a ) and azimuthally ( total range less than 60 degrees ) from their original lattice sites on the myosin filament surface to attach in defined target areas on the actin filaments .
C0001271
actin
C0025979
actin filaments