integer nres,nres0,nsup,nstart_sup,nend_sup,nstart_seq,
     & nchain,chain_border,chain_length,ireschain,npermchain,
     & tabpermchain,ishift_pdb,iz_sc
      double precision c,cref,cref_pdb,dc,xloc,xrot,dc_norm,t,r,prod,rt,
     & chain_rep
      common /chain/ c(3,maxres2+2),dc(3,maxres2),xloc(3,maxres),
     & xrot(3,maxres),dc_norm(3,maxres2),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),
     &  cref_pdb(3,maxres2+2),iz_sc,nsup,nstart_sup,
     &  nstart_seq,nend_sup,
     & chain_length(maxchain),npermchain,ireschain(maxres),
     & tabpermchain(maxchain,maxperm),
     & chain_border(2,maxchain),nchain
      double precision boxxsize,boxysize,boxzsize,enecut,sscut,sss,
     & sssgrad,
     & buflipbot, bufliptop,bordlipbot,bordliptop,lipbufthick,lipthick
      common /box/  boxxsize,boxysize,boxzsize,enecut,sscut,sss,sssgrad,
     & buflipbot, bufliptop,bordlipbot,bordliptop,lipbufthick,lipthick