read coor pdb XCR50_R3Cons_em_bcr3.pdb all rmsd coor heavy 3A-7A,13A-34A,38A-55A,58A-74A ave resSel_rmsd_heavy rmsd coor backbone 3A-7A,13A-34A,38A-55A,58A-74A ave resSel_rmsd_bb write selSi.pdb coor all all pdb quit