PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 7678053-8 1993 RI alpha-ret transcripts encode two isoforms of the chimeric protein (p76 and p81), which display constitutive tyrosine phosphorylation as well as a tyrosine kinase enzymatic activity. Tyrosine 111-119 ret proto-oncogene Homo sapiens 9-12