PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
11101483-7	2000	We propose that [(2)H(2)]methionine occurs by remethylation with [(2)H(2)]methyl groups (as 5-methyltetrahydrofolate) formed only from cytosolic processing of [(2)H(3)]serine, whereas [(2)H(1)]methionine is formed with labeled one-carbon units from mitochondrial oxidation of C-3 serine to [(2)H(1)]formate to yield cytosolic [(2)H(1)]methyl groups.	5-methyltetrahydrofolate	92-116	complement C3	Homo sapiens	276-279