PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18077419-3 2007 Here we show that Runx2-deficient primary osteoblasts fail to undergo senescence as indicated by the absence of beta-gal activity and p16(INK4a) tumor suppressor expression. beta-D-galactose 112-120 RUNX family transcription factor 2 Homo sapiens 18-23