def _add_mmcif_res_full(table):
    """
    Utility that adds a new column to the table.
    Adds a new column with the 'full res' (i.e. seq_id + ins_code).

    :param table: pandas DataFrame object
    :return: returns a modified pandas DataFrame
    """
    if 'label_seq_id' in table:
        table['label_seq_id_full'] = table['label_seq_id'] + table[
            'pdbx_PDB_ins_code'].str.replace('?', '')
    if 'auth_seq_id' in table:
        table['auth_seq_id_full'] = table['auth_seq_id'] + table[
            'pdbx_PDB_ins_code'].str.replace('?', '')
    return table
