integer nres,nsup,nstart_sup,nz_start,nz_end,nres0,nstart_seq
      double precision c,dc,dc_old,d_c_work,xloc,xrot,dc_norm,t,r,
     & prod,rt,dc_work,cref,crefjlee
      common /chain/ c(3,maxres2+2),dc(3,0:maxres2),dc_old(3,0:maxres2),
     & xloc(3,maxres),xrot(3,maxres),dc_norm(3,0:maxres2),
     & dc_work(MAXRES6),nres,nres0
      common /rotmat/ t(3,3,maxres),r(3,3,maxres),prod(3,3,maxres),
     &                rt(3,3,maxres) 
      common /refstruct/ cref(3,maxres2+2),crefjlee(3,maxres2+2),
     & nsup,nstart_sup,nstart_seq
      common /from_zscore/ nz_start,nz_end