def transgene_insertion_2(testapp, lab, award, ctcf):
    return {
        'lab': lab['@id'],
        'award': award['@id'],
        'category': 'transgene insertion',
        'purpose': 'in vivo enhancer characterization',
        'nucleic_acid_delivery_method': ['mouse pronuclear microinjection'],
        'modified_site_by_gene_id': ctcf['@id'],
        'introduced_sequence': 'ATCGTA'
    }