PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 17510082-8 2007 Aspirin induced the phosphorylation of p53 at residue Ser15 within 8 h in a caffeine-dependent manner, and also caused the activation of checkpoint kinase 2 and the cleavage of caspase 7. Aspirin 0-7 checkpoint kinase 2 Homo sapiens 137-156