PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
7673108-1	1995	Activation of Ras by the exchange of bound GDP for GTP is predominantly catalyzed by the guanylnucleotide exchange factor SOS.	Guanosine Triphosphate	51-54	xylosyltransferase 2	Homo sapiens	122-125