read coor pdb SR213_R3Cons_em_bcr3.pdb all rmsd coor heavy 7A-26A,42A-64A,70A-92A,97A-120A ave resOrd_rmsd_heavy rmsd coor backbone 7A-26A,42A-64A,70A-92A,97A-120A ave resOrd_rmsd_bb write best.pdb coor all all pdb quit