PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15226418-4 2004 Importantly, we identified a fusion peptide between the N-terminal methionine of ERK3 and the C-terminal glycine of ubiquitin in vivo by tandem mass spectrometry analysis. Methionine 67-77 mitogen-activated protein kinase 6 Homo sapiens 81-85