PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2645048-0 1989 Establishment and characterization of a melanoma cell line from a xeroderma pigmentosum patient: activation of N-ras at a potential pyrimidine dimer site. pyrimidine 132-142 NRAS proto-oncogene, GTPase Homo sapiens 111-116