PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11899248-6 2001 Inhibitor binding to fXa was increased by the introduction of a hydroxyl group on the proximal phenylamidine ring and by the introduction of fluorine atoms at C-3 and C-5 of the pyridine ring. pyridine 178-186 coagulation factor X Homo sapiens 21-24 15465335-6 2004 From observations of the SAR and modeling studies, we suggested the possibilities that the formation of hydrogen bond with the oxide anion in the "cation hole" and the affinity of cationic pyridine ring to S4 subsite were responsible for increase in anti-fXa activity. pyridine 189-197 coagulation factor X Homo sapiens 255-258 9618463-5 1998 The biphenylamidine of FX-2212a occupies the S1-pocket, and the pyridine ring makes hydrophobic interactions with the factor Xa aryl-binding site. pyridine 64-72 coagulation factor X Homo sapiens 118-127