PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1445249-6 1992 Human liver membranes also bound u-PA; binding was inhibited by pro-u-PA, the N-terminal fragment of u-PA, but not by the 33 kDa form of u-PA or by t-PA. Proline 64-68 plasminogen activator, urokinase Homo sapiens 33-37