PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
23116258-2	2012	Pyren-1-ylalanine was introduced into DHFR positions 16 and 49 using an in vitro expression system in the presence of pyren-1-ylalanyl-tRNA(CUA).	Dinuclear Copper Ion	140-143	dihydrofolate reductase	Homo sapiens	38-42