PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
15632126-3	2005	We demonstrate that ubiquitination of histone H2B on lysine 123 by the Rad6-Bre1 complex, is necessary for activation of Rad53 kinase and cell cycle arrest.	Lysine	53-59	checkpoint kinase 2	Mus musculus	121-126	
31209362-4	2020	Specifically, SIRT1 interacts with CHK2 and deacetylates it at lysine 520 residue, which suppresses CHK2 phosphorylation, dimerization, and thus activation.	Lysine	63-69	checkpoint kinase 2	Mus musculus	35-39	
31209362-4	2020	Specifically, SIRT1 interacts with CHK2 and deacetylates it at lysine 520 residue, which suppresses CHK2 phosphorylation, dimerization, and thus activation.	Lysine	63-69	checkpoint kinase 2	Mus musculus	100-104