PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
2985582-3	1985	Tetrahydrobiopterin can be oxidized under conditions which yield pterin or pterin 6-carboxylate without exchange of the C-6 and C-7 protons.	Pterins	13-19	complement C6	Bos taurus	120-123