Figure 3
X-ray diffraction patterns from live frog skeletal muscles taken with an image plate. (a) In the resting state. (b) During an isometric contraction. (c) In the rigor state. The vertical direction is parallel to the fibre axis. M is the meridional axis and E is the equatorial axis. A2.7 is the 2.7 nm actin meridional reflection; A5.1, A5.9 are the 5.1 and 5.9 nm actin layer-line reflections, respectively. M14.4–M2.9 are the myosin-based reflections with the third (14.4), sixth (7.2), ninth (4.8), 11th (3.9) and 15th (2.9) orders of the 42.9 nm basic repeat. |