read coor pdb MRR110B_R3_em_bcr3.pdb all rmsd coor heavy 2A-33A,38A-78A,83A-94A ave resSel_rmsd_heavy rmsd coor backbone 2A-33A,38A-78A,83A-94A ave resSel_rmsd_bb write selSi.pdb coor all all pdb quit