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  • *Lac Operon  (1)
  • Animals, Wild  (1)
  • American Association for the Advancement of Science (AAAS)  (2)
  • National Academy of Sciences
  • 1985-1989  (1)
  • 1980-1984  (1)
  • 1965-1969
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  • American Association for the Advancement of Science (AAAS)  (2)
  • National Academy of Sciences
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  • 1985-1989  (1)
  • 1980-1984  (1)
  • 1965-1969
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  • 1
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    Expression of the Escherichia coli lacZ gene on a plasmid vector in a cyanobacterium (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-11-15
    Description: A biphasic plasmid vector was used to introduce the Escherichia coli K-12 lac operon into the unicellular cyanobacterium Agmenellum quadruplicatum PR-6. The PR-6 transformants expressed beta-galactosidase at nearly as high a level as did Escherichia coli transformants. In order to accomplish this, it was necessary to obtain PR-6 mutants that could be transformed by plasmids with unmodified recognition sites for the endogenous PR-6 restriction endonuclease Aqu I. These mutants were generated by a variation of the ectopic mutagenesis techniques that have been used in other naturally transforming bacteria. The ability to assay the expression of lacZ in PR-6 paves the way for the construction of gene fusions with various PR-6 promoters and quantitation of their expression under specific in vivo conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Buzby, J S -- Porter, R D -- Stevens, S E Jr -- GM 28609/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1985 Nov 15;230(4727):805-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2997920" target="_blank"〉PubMed〈/a〉
    Keywords: Cyanobacteria/*genetics ; DNA Restriction Enzymes ; Escherichia coli/*genetics ; *Genetic Vectors ; *Lac Operon ; *Plasmids ; beta-Galactosidase/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Toxicant-disease-environment interactions associated with suppression of immune system, growth, and reproduction (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-06-01
    Description: The effects of marginal malnourishment , infections, and environmental chemicals on growth and reproductive success in Swiss-Webster white mice and wild deer mice were studied with fractional factorial designs. Interaction effects were discovered. For example, malnourished mice were more sensitive to virus exposure and environmental chemicals (a plant growth regulator or polychlorinated biphenyls). Since several commercial plant growth regulators also appear to suppress the immune system, these results cast doubt on the adequacy of current toxicity testing procedures in which factors are studied individually and not in combination.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Porter, W P -- Hinsdill, R -- Fairbrother, A -- Olson, L J -- Jaeger, J -- Yuill, T -- Bisgaard, S -- Hunter, W G -- Nolan, K -- 5-T32-ES07015/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1984 Jun 1;224(4652):1014-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6426058" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Wild ; Chlormequat/adverse effects ; Cyclophosphamide/adverse effects ; Encephalomyelitis, Venezuelan Equine/physiopathology ; Environmental Exposure ; Female ; Food Supply ; Growth/*drug effects ; Humans ; Immunity/*drug effects ; Mice ; Nutrition Disorders/physiopathology ; Peromyscus ; Polychlorinated Biphenyls/adverse effects ; Pregnancy ; Reproduction/*drug effects ; Water Supply
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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    PAPER CURRENT
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