PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18373075-5 2008 However, at a low dose of etoposide (repairable damage), Bid activated the S phase checkpoint through the up-regulation of p21 and p27, which are both p53-independent. Etoposide 26-35 H3 histone pseudogene 16 Homo sapiens 123-126