PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
11534936-1	2001	BACKGROUND AND AIMS: L-Arg is the substrate for nitric oxide, and also for L-ornithine which, in turn, is the precursor for the synthesis of collagen and polyamines.	Ornithine	75-86	Rho guanine nucleotide exchange factor 12	Rattus norvegicus	21-26