PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 14727811-1 2003 The aim of the study reported here was to investigate whether the azoxymethane (AOM)-induced colon cancer rat model mimics the human situation with regard to microsatellite stability, changes in expression of beta-catenin, and/or changes in the sequence of the proto-oncogene Ki-ras. Azoxymethane 66-78 KRAS proto-oncogene, GTPase Homo sapiens 276-282