PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9398735-3 1997 In MEN 2B patients, a specific mutation at codon 918, substituting a threonine for a methionine, has been found in 95% of cases. Threonine 69-78 ret proto-oncogene Homo sapiens 3-9