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A Simple and Universal Method to Express Protein in Unfused form

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The effect of additional amino acid residue(s) fused to the N- and/or C-terminal on properties of the heterogeneously expressed protein is usually difficult to be predicted. Recombinant proteins expressed without any fused sequence should be the most desired materials for related studies, such as protein drug preparation, biochemistry investigations. Here, we report a very simple and universal method enabling the expression of protein in its unfused form between the same two restriction enzyme sites (at a higher level) if a plasmid can support the fused expression. The method provided an assessable solution for unfused expression without increase in experimental resource; the necessary material is an additional primer. The method is especially useful for making whole-cell biocatalyst in which no purification steps are required.
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Keywords: Primer design; polymerase chain reaction; protein drug; unfused expression; whole-cell biocatalyst

Document Type: Research Article

Publication date: 01 September 2012

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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