PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 17459732-6 2007 Results showed that CEF was the best supporter for PGC growth and proliferation, which was verified by 5-bromo-2"-deoxyuridine incorporation stain. cef 20-23 progastricsin Gallus gallus 51-54 17459732-7 2007 FCS alone or in combination with LIF could significantly promote PGC proliferation in the presence of CEF in ITS medium. cef 102-105 progastricsin Gallus gallus 65-68