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  • Articles  (3)
  • Freeze-fracture  (2)
  • Ca2-modulated contractile protein  (1)
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  • Articles  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Structural specialization of the paraflagellar body membrane ofEuglena (1983)
    Springer
    Protoplasma 117 (1983), S. 154-157 
    Details
    ISSN: 1615-6102
    Keywords: Paraflagellar body membrane ; Freeze-fracture ; Euglena ; Phototaxis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The membrane overlying the paraflagellar body (PFB) ofEuglena gracilis is structurally specialized when studied with the freeze-fracture technique. This membrane area is characterized by exclusion of larger-sized (10–14nm) intramembrane particles and appears relatively smooth. In a limited region this membrane is closely appressed to the plasmalemma of the reservoir adjacent to the eyespot globules. The membrane specializations in the PFB-membrane ofEuglena are discussed in relation to photoreception and sensory transduction during phototaxis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01288353
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Occurrence and distribution of filipin-sterol complexes in chloroplast envelope membranes of algae and higher plants as visualized by freeze-fracture (1981)
    Springer
    Protoplasma 109 (1981), S. 349-358 
    Details
    ISSN: 1615-6102
    Keywords: Algae ; Chloroplast envelopes ; Filipin-sterol complexes ; Freeze-fracture ; Higher plants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The occurrence and planar distribution of 3-β-hydroxysterols in chloroplast envelope membranes of different algae and higher plants has been studied with the freeze-fracture technique using the polyene antibiotic filipin as cytochemical marker. The inner chloroplast envelope membrane in all organisms studied is devoid of filipin-sterol complexes. The outer chloroplast envelope membranes of isolated higher plant chloroplasts (spinach, pea) and of chloroplasts of the mossPolytrichum piliferum are lacking filipin-sterol complexes, thus indicating a very low concentration of 3-β-hydroxysterols in chloroplast envelope membranes of higher plants. In contrast filipin-sterol complexes are abundant in the outer chloroplast envelope membrane of the flagellatesChlamydomonas reinhardii, Cryptomonas erosa, andEuglena gracilis. The chloroplast-ER surrounding the plastid ofCryptomonas erosa also exhibits filipin-sterol complexes. Functional and phylogenetic aspects of these observations are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01287452
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  • 3
    Electronic Resource
    Electronic Resource
    A polyclonal antibody (anticentrin) distinguishes between two types of fibrous flagellar roots in green algae (1988)
    Springer
    Protoplasma 144 (1988), S. 56-61 
    Details
    ISSN: 1615-6102
    Keywords: Immunocytochemistry ; Centrin ; Ca2-modulated contractile protein ; Flagellar apparatus ; Green algae ; Fibrous flagellar roots
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The two main types of fibrous flagellar roots present in the flagellar apparatus of green algae (system I and system II fibers) are immunologically distinct as indicated by the localization of a Ca2+-modulated contractile protein (centrin) exclusively in one type (system II fibers) but not in the other type (system I fibers). A polyclonal antibody generated against the major protein of the striated flagellar roots (system II fibers) of the quadriflagellate green algaTetraselmis striata was used to localize centrin by immunofluorescence and pre- and postembedding immunogold electron microscopy in the flagellar apparatus ofSpermatozopsis similis, S. exsultans, Chlamydomonas reinhardtii, Dunaliella bioculata, Polytomella parva and gametes ofMonostroma grevillei andEnteromorpha sp. Whereas the antibody recognizes centrin in connecting fibers and system II fibers, no labeling occurs in system I fibers in all taxa investigated. This study presents the first evidence that system I fibers lack centrin and indicates that the two main types of fibrous flagellar roots in green algae are biochemically distinct.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01320280
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