PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 399458-4 1979 Finally, nuclei have been demonstrated to catalyze the formation of benzo[a]pyrene syn- and anti-diolepoxides, ultimate carcinogenic forms of this polycyclic hydrocarbon. Hydrocarbons, Cyclic 147-169 synemin Homo sapiens 83-86