title: [Construction of recombinant plasmids encoding the biosynthesis of the beta-subunit of cholera toxin].
abstract: The structure of the cholera toxin operon and the location of A and B toxin subunits have been studied by the Southern blot hybridization on filters. The gene coding for the synthesis of the cholera toxin B-subunit has been cloned in the vector plasmid pBR322. The structural gene of A-subunit has been partially deleted by the restriction endonuclease Bal31 digestion. The size of the 250 b. p. deletion has been defined by electron microscopy. The production of the cholera toxin B-subunit in Escherichia coli K12 cells has been studied.
mesh_terms: D002772:Cholera Toxin / Q000096:biosynthesis / Q000235:genetics* / Q000276:immunology; D022121:Cholera Vaccines / Q000276:immunology; D003001:Cloning, Molecular; D004262:DNA Restriction Enzymes; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D010446:Peptide Fragments / Q000096:biosynthesis / Q000235:genetics* / Q000276:immunology; D010957:Plasmids; D014169:Transformation, Bacterial; D014734:Vibrio cholerae / Q000235:genetics / Q000472:pathogenicity
chemical_list: D022121:Cholera Vaccines; D010446:Peptide Fragments; C050310:cholera toxin, B subunit (50-64); D002772:Cholera Toxin; D004262:DNA Restriction Enzymes
vernacular_title: Konstruirovanie rekombinantnykh plazmid, kodiruiushchikh biosintez beta-sub''edinitsy kholernogo toksina.