def rnai_1(testapp, lab, award, source, target):
    item = {
        'lab': lab['@id'],
        'award': award['@id'],
        'category': 'interference',
        'purpose': 'repression',
        'method': 'RNAi',
        'reagents': [{'source': source['@id'], 'identifier': 'addgene:12345'}],
        'rnai_sequences': ['ATTACG'],
        'modified_site_by_target_id': target['@id']
    }
    return testapp.post_json('/genetic_modification', item).json['@graph'][0]