PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
13679077-6	2003	We demonstrate that peroxynitrite and myeloperoxidase nitrate xanthine in vitro.	Xanthine	62-70	myeloperoxidase	Homo sapiens	38-53	
13679077-9	2003	Xanthine nitration by myeloperoxidase required hydrogen peroxide and nitrite.	Xanthine	0-8	myeloperoxidase	Homo sapiens	22-37	
1319356-7	1992	In contrast to methyl substitution in the 1 or 8 position of xanthine, substitution in the 3 or 7 position had a marked effect on the inhibition of MPO catalysis.	Xanthine	61-69	myeloperoxidase	Homo sapiens	148-151