read coor pdb CCR55_R3_em_bcr3.pdb all rmsd coor heavy 3A-22A,25A-31A,40A-49A,56A-62A,69A-74A,80A-98A,109A-112A ave resOrd_rmsd_heavy rmsd coor backbone 3A-22A,25A-31A,40A-49A,56A-62A,69A-74A,80A-98A,109A-112A ave resOrd_rmsd_bb write best.pdb coor all all pdb quit