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  • Title: A set of expression plasmids for the synthesis of fused and unfused polypeptides in Escherichia coli.
    Author: Zaballos A, Salas M, Mellado RP.
    Journal: Gene; 1987; 58(1):67-76. PubMed ID: 3319785.
    Abstract:
    A set of plasmid expression vectors for cloning of DNA fragments containing open reading frames has been obtained. The plasmids carry the strong leftward promoter of bacteriophage lambda and the translation initiation signals from either the gene ner of bacteriophage Mu or the gene 4 of bacteriophage phi 29. The vectors could overexpress the cloned sequences as fusion peptides at the N terminus with the N-terminal segment of the phi 29 protein p4 or at the C terminus with the Escherichia coli beta-galactosidase from its 8th residue, or both. Alternatively, the cloned sequences could be directed to overproduce proteins in an unfused form. DNA fragments of the hemagglutinin gene from human influenza A virus, have been cloned in one of the plasmid vectors and some potential antigenic determinants have been characterized using monoclonal antibodies.
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