we show that low-angle x-ray diffraction patterns from plaice fin muscle contain characteristic vertebrate layer lines at orders of 429 ( +/- 0.2 ) a , that these layer lines are well sampled by row-lines from a simple hexagonal lattice of a-spacing 470 ( +/- 2.0 ) a at rest length and that there are meridional reflections , due to axial perturbations of the basic helix of myosin heads , similar in position to those from frog muscle but differing in relative intensities .
C1521970
characteristic
C1444754
length