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  • 1
    Electronic Resource
    Electronic Resource
    Shortening velocity of single muscle cells isolated from a molluscan smooth muscle (1986)
    Springer
    Cellular and molecular life sciences 42 (1986), S. 810-812 
    Details
    ISSN: 1420-9071
    Keywords: Molluscan smooth muscle ; single smooth muscle cell ; unloaded contraction ; shortening velocity ; Mytilus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The maximal unloaded shortening velocity (Vmax) of smooth muscle cells isolated from the pedal retractor muscle ofMytilus was more than twice as large as that of the whole muscle, suggesting the presence of extracellular components which resist the contraction of the whole muscle. The Vmax of the isolated cells was almost constant at cell lengths ranging between 0.5 and 0.8310 (10, optimal length for tension generation) indicating that the intracellular resistance to contraction is negligible within this range of lengths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941532
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Polarity of myofilaments in molluscan smooth muscle (1983)
    Springer
    Cell & tissue research 234 (1983), S. 533-545 
    Details
    ISSN: 1432-0878
    Keywords: Molluscan smooth muscle ; Thick filament ; Thin filament ; Central bare zone ; Polarity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Myofilaments were isolated by gently homogenizing smooth muscle cells isolated from the pedal retractor muscle (PRM) of Mytilus edulis, and observed by electron microscopy. The thick filaments isolated in the presence of ATP (10–20 mM) had projections of myosin heads except near their centre (central bare zone). After extraction of myosin, the paramyosin core of the thick filaments showed a Bear-Selby net or a striated pattern with a main periodicity of 14.5 nm. Both the Bear-Selby net and the striated patterns had a polarity that reversed at the centre of the filament where the patterns were obscured. The thin filaments were attached to dense bodies. Decoration of the thin filaments with heavy meromyosin showed that they have opposite polarity on opposing sides of the dense body. The results indicate that the thick filaments are bipolar and also that the dense bodies are functionally analogous to the Z-disk of the striated muscle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00218649
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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