PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 12447726-5 2002 Mutations are selected in HBV polymerase that can discriminate among the structural differences between lamivudine triphosphate and the natural substrate mimicked by lamivudine, dCTP, causing steric hindrance and reduced efficiency of incorporation of lamivudine but not the natural substrate. Lamivudine 104-114 cut up Drosophila melanogaster 178-182