read coor pdb DHR8C_R3_em_bcr3.pdb all rmsd coor heavy 5M-27M,30M-40M,50M-62M ave resSel_rmsd_heavy rmsd coor backbone 5M-27M,30M-40M,50M-62M ave resSel_rmsd_bb write selSi.pdb coor all all pdb quit