Myonemes


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Myonemes

 

contractile protein filaments in the cytoplasm of protozoans, generally in the superficial layers of the body. They may be smooth or striated and, like myofibrils, they possess double refraction. They consist of dozens or, more often, hundreds of fibrils from 3 to 25 nanometers in diameter. The contraction and thickening of the myonemes alter the shape of a protozoan’s body or part of it, such as the tentacles or the gullet.

References in periodicals archive ?
Second, the peristomial ring formed by the myonemes does not fluoresce as strongly as with the N-termVcCentrin4-antibody.
2004a), and immunocytochemical studies provided evidence that NMDA receptors exist on the surface of nerve cells, nematocytes, myonemes of epitheliomuscular cells, and interstitial stem cells (Scappaticci et al.
Nerve processes from the gastrodermis crossed the muscle-free border of the mesoglea and entered into the individual oblong bundles of oral sphincter myonemes (Fig.