Fig. 1

Structure of prokaryotic and eukaryotic genes. A and B show the elements that comprise the canonical genes. A In prokaryotic genes, the regulatory gene elements for transcription are sited upstream, downstream, and on regulatory sequences such as RBS and intergenic UTRs. B In eukaryotic genes, the regulatory gene elements for transcription are sited upstream, downstream, and intronic regions. 5′-UTR: 5′-untranslated region, 3′-UTR: 3′-untranslated region, RBS: ribosome binding site