title: A set of expression plasmids for the synthesis of fused and unfused polypeptides in Escherichia coli.
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.
authors.affiliation: Centro de Biologia Molecular (CSIC-UAM), Universidad Autónoma, Canto Blanco, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Zaballos
authors.forename: M
authors.initials: M
authors.lastname: Salas
authors.forename: R P
authors.initials: RP
authors.lastname: Mellado
mesh_terms: D001483:Base Sequence; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics* / Q000378:metabolism; D005822:Genetic Vectors; D006389:Hemagglutinins, Viral / Q000235:genetics; D008969:Molecular Sequence Data; D010452:Peptide Biosynthesis; D010455:Peptides / Q000235:genetics*; D010957:Plasmids; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis / Q000235:genetics
chemical_list: D006389:Hemagglutinins, Viral; D010455:Peptides; D011993:Recombinant Fusion Proteins