PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11191351-5 2000 Due to the deficiency of p34cdc2 and Cyclin B1, the spermatogonia and pachytene/diplotene primary spermatocytes were unable to form MPF, hence, they couldn"t undergo karyokinesis. diplotene 80-89 cyclin dependent kinase 1 Homo sapiens 25-32