read coor pdb SSR10_R3_em_bcr3.pdb all rmsd coor heavy 6A-56A,63A-70A,73A-91A,100A-122A ave resOrd_rmsd_heavy rmsd coor backbone 6A-56A,63A-70A,73A-91A,100A-122A ave resOrd_rmsd_bb write best.pdb coor all all pdb quit