A freeze-fracture study of the surface of the infective-stage larva of the nematode Trichinella |
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Authors: | D L Lee K A Wright R R Shivers |
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Institution: | 1. Department of Pure & Applied Zoology, University of Leeds, Leeds LS2 9JT, England;2. Department of Zoology, University of Toronto, Toronto, Ontario M5S 1A1, Canada;3. Department of Zoology, University of Western Ontario, London, Ontario N6A 3K7, Canada |
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Abstract: | The surface layers of the cuticle of the infective, first-stage larva of the nematodes Trichinella spiralis and T. spiralis var. pseudospiralis have been studied by means of the freeze-fracturing technique. No obvious differences between the two nematodes were found. A double-layered structure covers the cuticle. Its outermost layer consists of particles embedded in an amorphous matrix; its inner layer is composed of a sheet of fine filaments which may be composed of globular subunits. This unique double layered structure is not like a normal cell membrane in structure. The surface of the cuticle beneath it is relatively smooth except for impressions from the inner surface of the double-layered structure. The cuticle surface did not fracture in the manner of a cell membrane. |
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Keywords: | Nematode cuticle freeze-fracture |
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