def _get_subexons_to_rescue(subexon_table):
    """Return a DataFrame with the subexons to rescue."""
    return subexon_table.loc[subexon_table['Cluster'] < 0, [
        'SubexonIDCluster', 'Cluster', 'SubexonProteinSequence']
        ].drop_duplicates(subset='SubexonIDCluster').to_dict('records')
