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  • 2000-2004  (1)
  • 1985-1989  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Colicins produced by the Escherichia fergusonii strains closely resemble colicins encoded by Escherichia coli (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 208 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Plasmid DNA of six Escherichia fergusonii colicinogenic strains (three producers of colicin E1, two of Ib and one of Ia) was isolated and the colicin-encoding regions of the corresponding Col plasmids were sequenced. Two new variants of colicin E1, one of colicin Ib, and one of colicin Ia were identified as well as new variants of the colicin E1 and colicin Ib immunity proteins and the colicin E1 lysis polypeptide. The recombinant Escherichia coli producer harboring pColE1 from E. fergusonii strain EF36 (pColE1-EF36) was found to be only partially immune to E1 colicins produced by two other E. fergusonii strains suggesting that pColE1-EF36 may represent an ancestor ColE1 plasmid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11091.x
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  • 2
    Electronic Resource
    Electronic Resource
    Cell morphology and growth characteristics ofPorphyridium aerugineum (Rhodophyta) (1989)
    Springer
    Plant systematics and evolution 164 (1989), S. 263-272 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; Rhodophyta ; Porphyridiales ; Porphyridium aerugineum ; Cell morphology ; surface structure ; cell size ; growth parameters ; photosynthetic pigments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four unialgal strains of the freshwater coccoid red algaPorphyridium aerugineum Geitler were cultivated under laboratory conditions. Cell morphology was studied with the light microscope. The cell surface was examined by means of electron microscopy in order to contribute to the knowledge of polysaccharide sheaths and cytoplasmic membranes. Optimum growth conditions were determined. The range of cell sizes and the average dry masses of single cells were compared in all four strains cultivated at exactly defined temperatures and irradiances. Photosynthetic pigment maxima were measured in intact cells. The red-coloured phycobiliprotein phycoerythrin was not found in any of the examined strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940442
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    Paper (German National Licenses)
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