read coor pdb ZR18_NMR_em_bcr3.pdb all rmsd coor heavy 14A-18A,28A-32A,38A-50A,53A-67A,70A-82A ave resSel_rmsd_heavy rmsd coor backbone 14A-18A,28A-32A,38A-50A,53A-67A,70A-82A ave resSel_rmsd_bb write selSi.pdb coor all all pdb quit