integer nres,nres0,nsup,nstart_sup,nend_sup,nstart_seq,nref,
     & tabpermchain,npermchain,chain_length,chain_border,nchain
      double precision c,dc,xloc,xrot,dc_norm,dc_norm2,t,r,prod,rt,cref,
     & crefjlee
      common /chain/ c(3,maxres2+2),dc(3,0:maxres2),xloc(3,maxres),
     &xrot(3,maxres),dc_norm(3,maxres2),dc_norm2(3,0: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,maxref,maxT,maxprot),
     & nsup(maxprot),nstart_sup(maxprot),nend_sup(maxprot),nstart_seq,
     & nref(maxT,maxprot),chain_length(maxchain),
     & npermchain,tabpermchain(maxchain,maxperm),
     & chain_border(2,maxchain),nchain
      double precision boxxsize,boxysize,boxzsize,enecutt,sscut,sss,
     &sssgrad,
     & buflipbot, bufliptop,bordlipbot,bordliptop,lipbufthick,lipthick
      common /box/ boxxsize,boxysize,boxzsize,enecutt,sscut,sss,sssgrad,
     & buflipbot, bufliptop,bordlipbot,bordliptop,lipbufthick,lipthick