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    Cytoplasmic filaments in developing and adult vertebrate smooth muscle.

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    Author
    Uehara, Y; Campbell, GR; Burnstock, G
    Date
    1971-08
    Source Title
    The Journal of Cell Biology
    Publisher
    Rockefeller University Press
    University of Melbourne Author/s
    Burnstock, Geoffrey
    Affiliation
    Pharmacology and Therapeutics
    Metadata
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    Document Type
    Journal Article
    Citations
    Uehara, Y., Campbell, G. R. & Burnstock, G. (1971). Cytoplasmic filaments in developing and adult vertebrate smooth muscle.. J Cell Biol, 50 (2), pp.484-497. https://doi.org/10.1083/jcb.50.2.484.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/255696
    DOI
    10.1083/jcb.50.2.484
    Open Access at PMC
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2108268
    Abstract
    An extensive study of adult and developing smooth muscle has revealed the widespread occurrence of a distinct filament with an average diameter of about 100 A (termed the 100 A filament). Unlike that of myofilaments, their appearance in longitudinal section is uniform, but in transverse section they have a round profile, occasionally exhibiting a less electron-opaque core. The 100 A filaments are almost invariably preserved under a variety of fixation procedures, whereas myofilaments, particularly the thicker filaments, are preserved inconsistently. The 100 A filaments appear to be randomly oriented throughout the cytoplasm, either singly or in small groups, although they are sometimes concentrated in the juxtanuclear region of the smooth muscle cells. The intimate association of 100 A filaments with dark bodies, in both developing and adult smooth muscle cells, may indicate that these filaments either play a role in dark body formation or, at least, constitute a part of the dark body. The 100 A filaments are conspicuous in developing smooth muscle cells and occasionally form networks or clusters; they appear to decrease in relative number as maturation proceeds, but considerable numbers are still present in adult tissue.

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