PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
21597804-3	1995	Thymidylate synthetase and thymidine kinase, key enzymes in the de novo and salvage pathways, respectively, for pyrimidine nucleotide synthesis were found to be reduced and elevated, respectively, with increasing cellular differentiation.	Pyrimidine Nucleotides	112-133	thymidylate synthetase	Rattus norvegicus	0-22