PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11720449-7 2001 In the presence of calf thymus DNA, pure recombinant human topoisomerase II beta protein was selectively depleted from SDS-gels, whereas no depletion of topoisomerase II alpha protein was observed. Sodium Dodecyl Sulfate 119-122 DNA topoisomerase II beta Homo sapiens 59-80