##  find-RotAx-ReOriMat.pl:
##  The following 4x4 matrix [1 .. 16] 
##  orients the opened form so
##  that the axis of rotation is along the z-axis and
##  the origin is at the molecular centroid.
##  When this done the protein motion can be expressed
##  as a rotation angle [17] 
##  followed by a translation vector [18 ..20]
 0.013180        0.999908        0.003355       -32.039730
  0.246722       0.000000       -0.969086       19.795520
 -0.968997       0.013600       -0.246699        2.258460
  0.000000       0.000000        0.000000        1.000000
 
148.0176 
-5.364128       -1.545409        1.721545