PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15571296-3 2004 After six days of incubation in the presence of each specific inhibitor at 10 x IC50 levels a cytostatic and differentiating effect was only observed with the PDE5 inhibitors Zaprinast and MY-5445. zaprinast 175-184 phosphodiesterase 5A Homo sapiens 159-163