PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21394111-5 2011 Interestingly, expression of excess APRT in bystander cells improved the activity of MeP-dR, but diminished the activity of F-araAMP. fludarabine phosphate 124-132 adenine phosphoribosyltransferase Homo sapiens 36-40