read coor pdb CCR55_NMR_em_bcr3.pdb all rmsd coor heavy 3A-22A,26A-31A,40A-49A,56A-62A,69A-73A,80A-96A,109A-112A ave resSel_rmsd_heavy rmsd coor backbone 3A-22A,26A-31A,40A-49A,56A-62A,69A-73A,80A-96A,109A-112A ave resSel_rmsd_bb write selSi.pdb coor all all pdb quit