PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
16427628-2	2006	We showed that all RET-PTC-1 mutants in which the C in this motif (C376) was replaced with glycine, lysine, threonine or serine lost their activity in vitro.	Serine	121-127	ret proto-oncogene	Homo sapiens	19-22