PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21729334-7 2011 Substitution of a single oxygen atom in the terminal beta-phosphate group of a potent cofactor ADP by sulfur results in ADPbetaS, a cofactor that binds to Ire1 as well as to ADP but does not activate RNase. beta-phosphate 53-67 endoplasmic reticulum to nucleus signaling 1 Homo sapiens 155-159