PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
17941019-12	2008	In addition, perfusion culture at low oxygen (5%) enhanced the expansion of CD34+ cells and colony-forming activity compared to high oxygen (19%) cultures.	Oxygen	38-44	CD34 molecule	Homo sapiens	76-80