read coor pdb HR1958_R3Cons_em_bcr3.pdb all rmsd coor heavy 4A-16A,19A-30A,33A-67A,71A-139A ave resOrd_rmsd_heavy rmsd coor backbone 4A-16A,19A-30A,33A-67A,71A-139A ave resOrd_rmsd_bb write best.pdb coor all all pdb quit