 Structure statistics are often calculated only over the well-ordered region(s) \
  of the biopolymer. Portions of the macromolecule are often mobile and    \
  disordered,  hence they are excluded in calculating the statistics. To define\
  the range(s) over which the statistics are calculated, enter the beginning   \
  residue number(s): e.g. if the regions used were 5-32 and 41-69, enter 5,41      