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Distribution and analysis of plasmids inStreptococcus thermophilus

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Journal of Industrial Microbiology

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In a survey of 35 strains ofStreptococcus thermophilus, 13 strains were found to harbor plasmid DNA. Most of these strains contained plasmid species varying in size from 2.2 to 7.15 kilobases. Only three strains had more than one plasmid species. Each of the nine distinct types of plasmid DNAs identified had two or more unique recognition sites for restriction endonucleases. The characteristics of the indigenous cryptic plasmids ofS. thermophilus may allow their development as cloning vectors useful in the genetic engineering of this species and other streptococci that are important in food production

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Authors and Affiliations

  1. Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 E. Mermaid Lane, 19118, Philadelphia, PA, USA

    G. A. Somkuti & D. H. Steinberg

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  1. G. A. Somkuti
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  2. D. H. Steinberg
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Somkuti, G.A., Steinberg, D.H. Distribution and analysis of plasmids inStreptococcus thermophilus . Journal of Industrial Microbiology 1, 157–163 (1986). https://doi.org/10.1007/BF01569267

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  • DOI: https://doi.org/10.1007/BF01569267

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