def getHifiMissenseData(data):
    """
    Keeps only those rows that correspond to HiFI missense mutations.
    Arguments:
        data =  dataframe
    Returns:
        tp_data = dataframe
    """
    tp_data = data[(data["Mutation Description"] == 'Substitution - Missense')]
    tp_data = tp_data[(tp_data["PP2_prob1"] >= 0.85)]
    return tp_data