Initial Minimization of solvent + ions
 &cntrl
  imin   = 1,
  maxcyc = 1000,
  ncyc   = 500,
  ntb    = 1,
  ntr    = 1,
  cut    = 10.0,
  icfe = 2, klambda = 6, clambda = 0.5
 /
Hold the RNA fixed
500.0
RES 1 8
END
END
