def fetch_ensembl_transcripts(build=None, chromosomes=None):
    """Fetch the ensembl genes

    Args:
        build(str): ['37', '38']
        chromosomes(iterable(str))

    Returns:
        result(iterable): Ensembl formated transcript lines
    """
    chromosomes = chromosomes or CHROMOSOMES
    LOG.info("Fetching ensembl transcripts")

    attributes = [
        "chromosome_name",
        "ensembl_gene_id",
        "ensembl_transcript_id",
        "transcript_start",
        "transcript_end",
        "refseq_mrna",
        "refseq_mrna_predicted",
        "refseq_ncrna",
    ]

    filters = {"chromosome_name": chromosomes}

    return fetch_ensembl_biomart(attributes, filters, build)