PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 24550689-7 2014 In addition, bufalin was also found to induce ER stress-mediated apoptosis, which was supported by the up- regulation of ER stress markers, CHOP and GRP78, and augmented phosphorylation of PERK and eIF2alpha as well as cleavage of caspase-4. bufalin 13-20 caspase 4 Homo sapiens 231-240