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  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Spine-scale reorientation inApedinella radians (Pedinellales, Chrysophyceae): the microarchitecture and immunocytochemistry of the associated cytoskeleton (1988)
    Springer
    Protoplasma 147 (1988), S. 25-41 
    Details
    ISSN: 1615-6102
    Keywords: Actin ; Apedinella ; Centrin ; Cytoskeleton ; Motility ; Tubulin (Microtubules)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Motile unicells ofApedinella radians have the extraordinary ability to instantaneously reorient six elongate spine-scales located on the cell surface. Extracellular striated fibrous connectors (termed microligaments) attach spine-scales to discrete regions of the plasma membrane underlain by intricate cytoplasmic plaques. A complex cytoskeleton is associated with the plaques and appears responsible for spine-scale movement. Three cytoskeletal proteins have thus far been identified by immunofluorescence using anti-tubulin, anti-actin, and anti-centrin. The three-dimensional configuration of the cytoskeleton has been established and consists of filamentous bundles of actin and centrin which form stellate systems interconnecting the plaques. Additionally, there is a network of microtubular triads which originate on the surface of the nuclear envelope and subtend the plasma membrane and also support several tentacular protrusions. It is proposed that contraction of the actin and/or centrin filamentous bundles is responsible for the reorientation of the spine-scales.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01403875
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    Paper (German National Licenses)
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