read coor pdb HR3102A_NMR_em_bcr3.pdb all rmsd coor heavy 11A-30A,33A-42A,46A-83A ave resOrd_rmsd_heavy rmsd coor backbone 11A-30A,33A-42A,46A-83A ave resOrd_rmsd_bb write best.pdb coor all all pdb quit