'GET /api/genomes/{id}/sequences
This is a wrapper for accepting sequence requests that
want a raw return, not json'

@web.expose_api_raw_anonymous
def sequences(self, trans, id, num=None, chrom=None, low=None, high=None, **kwd):

    id = get_id(id, kwd.get('format', None))
    reference = is_true(kwd.get('reference', False))
    assert reference
    region = self.app.genomes.reference(trans, dbkey=id, chrom=chrom, low=low, high=high)
    return region.sequence
