Three different isoforms of CBF beta were also tested for transcriptional activity on the SL3 enhancer .
three different isoforms of cbf beta were also tested for transcriptional activity on the sl3 enhancer .
O O O O B-protein_subunit I-protein_subunit O O O O B-other_name I-other_name O O B-DNA_domain_or_region I-DNA_domain_or_region O