PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7914928-6 1994 Both anti-PAF and H1 antihistamine activities have shown a high dependence on the exact nature and position of the substituent in the pyridine ring. pyridine 134-142 PCNA clamp associated factor Rattus norvegicus 10-13 3119503-5 1987 The lyso-PAF fraction obtained was acetylated to PAF chemically with pyridine and acetic anhydride. pyridine 69-77 PCNA clamp associated factor Rattus norvegicus 9-12 3119503-5 1987 The lyso-PAF fraction obtained was acetylated to PAF chemically with pyridine and acetic anhydride. pyridine 69-77 PCNA clamp associated factor Rattus norvegicus 49-52