PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 33605213-4 2021 Mass spectrometry analysis showed that exposure to ROS converted 4 out of 9 Met residues of RecA to methionine sulfoxide. methionine sulfoxide 100-120 RAD51 recombinase Homo sapiens 92-96