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.	pyrimidine	80-90	complement C6	Bos taurus	15-18	
486504-10	1979	These observations can be explained by assuming that for attack at C-6, the enzyme must bind both to N-1 and N-2 in the pyrazole ring and causes tautomerisation, which places a double bond at position 5,6 in the pyrimidine ring.	pyrimidine	212-222	complement C6	Bos taurus	67-70