PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 17548217-13 2007 Besides the three penicillin biosynthetic genes (pcbAB, pcbC and penDE) only one ORF has an orthologue of known function in the database: the Saccharomyces cerevisiae gene ERG25. Penicillins 18-28 methylsterol monooxygenase Saccharomyces cerevisiae S288C 172-177