Protein synthesis

The method of producing native, unfused prokaryotic or eukaryotic protein in bacteria which comprises inserting into a bacterial plasmid a gene for a prokaryotic or eukaryotic protein and a portable promoter consisting of a DNA fragment containing a Shine-Dalgarno sequence and a transcription initiation site recognized by RNA polymerase and containing no protein translational start site, said promoter being inserted upstream from a protein ATG translational start site of said gene, at a position to obtain production of said protein, to form a fused gene having said Shine-Dalgarno sequence, said transcription initiation site, and the ATG signalling the start point of translation, inserting said plasmid into said bacteria to transform said bacteria with said plasmid containing said fused gene, and culturing the transformed bacteria to produce said unfused prokaryotic or eukaryotic protein.