Changes in the intensity and spacing of some x-ray reflections upon stretch.

1The off-meridional x-ray intensities of the M1 and A1 layer lines in the region of the 10 and 11 row lines (0.018–0.06 nm−1).2The meridional x-ray intensity of the M3 reflection integrated in the radial range of ±0.018 nm−1 and meridional range of 0.066–0.072 nm−1 in the experiments with short x-ray camera.3Average meridional spacing of the M3 reflection measured as the center of gravity of the intensity profile in the same meridional and radial range as IM3. Summed data for all three experiments with long x-ray camera.4Average spacing of the M3 reflection calculated only for the data points where the intensity was above 5% of the peak value to avoid possible errors caused by background subtraction or the presence of non-myosin reflections; the same data set as for SM3.5The ratio of the amplitudes of the high- and low-angle peaks in the fine structure of the M3 reflection. Statistics was obtained by analysing the M3 intensities in each half of the pattern in three experiments with long x-ray camera.