Minimize
 &cntrl
  imin=1,
  ntb=1,
  ntx=1,
  irest=0,
  maxcyc=10000,
  ncyc=5000,
  ntpr=100,
  ntwx=0,
  cut=8.0,
  iwrap=1,
  ntr=1, restraintmask=':1-64', restraint_wt=20.0,
 /
