PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9074721-7 1996 A single point mutation leading to the replacement of a methionine by a threonine within the tyrosine kinase domain has been detected in almost all cases of MEN 2B. Threonine 72-81 ret proto-oncogene Homo sapiens 157-163