PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22940639-2 2013 Prostasomes are small vesicles secreted by prostatic epithelial cells that can be recruited by and fuse with sperm cells in response of progesterone that is released by oocyte surrounding cumulus cells. Progesterone 136-148 Polykaryocytosis inducer Homo sapiens 99-103