read coor pdb HR41_R3_em_bcr3.pdb all rmsd coor heavy 4A-17A,22A-73A,76A-97A,100A-102A,119A-131A,133A-159A ave resOrd_rmsd_heavy rmsd coor backbone 4A-17A,22A-73A,76A-97A,100A-102A,119A-131A,133A-159A ave resOrd_rmsd_bb write best.pdb coor all all pdb quit