PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
12825-9	1977	Methylation at C-6 in the pyrazine moiety enhances enzymic attack at C-2 in the pyrimidine ring.	Pyrazines	26-34	complement C2	Bos taurus	69-72