DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Colour enhanced transmission electron micrograph of microvilli of the brush border of cat intestinal epithelium. This transverse section of intestinal brush border shows the actin filaments that form the core of each microvillus. At the villus tip, the relation of the filaments to the membrane is obscured by a layer of dense amorphous material associated with the inner aspect of the membrane.
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