PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 15531548-2 2004 We describe here a novel germline homozygous mutation in exon 15 of the RET gene that determines an amino acid substitution (Ala->Thr) at codon 883. Threonine 133-136 ret proto-oncogene Homo sapiens 72-75