PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
12543137-7	2003	A set of new nitrogen and oxygen-specific descriptors were developed especially for this data set to better encode structural features, which are believed to directly influence DHFR inhibition and selectivity.	Oxygen	26-32	dihydrofolate reductase	Homo sapiens	177-181	
10962643-11	2000	These studies indicated that the stability of the glutamyl interaction is due to the interaction of glutamyl oxygen atoms with the DHFR protein.	Oxygen	109-115	dihydrofolate reductase	Homo sapiens	131-135