PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
1637609-0	1992	Influence of vitamin B12 status on the inactivation of methionine synthase by nitrous oxide.	Nitrous Oxide	78-91	5-methyltetrahydrofolate-homocysteine methyltransferase	Homo sapiens	55-74	
1637609-1	1992	We have studied the influence of maternal serum B12 concentration on the inactivation of placental methionine synthase activity by nitrous oxide in an obstetric population.	Nitrous Oxide	131-144	5-methyltetrahydrofolate-homocysteine methyltransferase	Homo sapiens	99-118	
1637609-4	1992	There was a highly significant relation between placental methionine synthase activity and duration of exposure to nitrous oxide.	Nitrous Oxide	115-128	5-methyltetrahydrofolate-homocysteine methyltransferase	Homo sapiens	58-77