PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
32028527-3	2020	These post-translational modification events are predominantly serine-linked and require HPF1, an accessory factor that is specific for the DNA damage response and switches the amino-acid specificity of PARP1/2 from aspartate/glutamate to serine residues5-10.	Aspartic Acid	216-225	histone PARylation factor 1	Homo sapiens	89-93	
29480802-5	2018	In the absence of HPF1, glutamate/aspartate becomes the main target residues for ADPr.	Aspartic Acid	34-43	histone PARylation factor 1	Homo sapiens	18-22	
34795260-5	2021	HPF1 rapidly associates/dissociates from multiple PARP1 molecules, initiating serine modification before modification initiates on glutamate/aspartate, and accelerating initiation to be more comparable to elongation reactions forming poly(ADP-ribose).	Aspartic Acid	141-150	histone PARylation factor 1	Homo sapiens	0-4