PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 16290060-7 2006 Moreover, proliferating cell nuclear antigen and p53 were expressed in 8-nitroguanine-positive epithelial cells in the basal layer. 8-nitroguanine 71-85 tumor protein p53 Homo sapiens 49-52