def make_variant_sequences_arg_parser(add_sequence_length_arg=False, **kwargs):
    """
    Parameters
    ----------
    add_sequence_length_arg : bool
        If True then add the `--cdna-sequence-length` argument. This may be
        omitted if the cDNA sequence length is inferred from a protein length.

    **kwargs : dict
        Passed directly to argparse.ArgumentParser

    Creates argparse.ArgumentParser instance with all of the options
    needed to translate each distinct cDNA sequence determined from
    variants & RNAseq.

    See `args.variant_sequences` for commandline parameters which aren't added
    in this module.
    """
    parser = make_rna_reads_arg_parser(**kwargs)
    add_variant_sequence_args(
        parser=parser,
        add_sequence_length_arg=add_sequence_length_arg)
    return parser