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This image shows collagen, a fibrous protein that's the main component of the extracellular matrix (ECM). Collagen is a strong, ropelike molecule that forms stretch-resistant fibers. The most abundant protein in our bodies, collagen accounts for about a quarter of our total protein mass. Among its many functions is giving strength to our tendons, ligaments and bones and providing scaffolding for skin wounds to heal. There are about 20 different types of collagen in our bodies, each adapted to the needs of specific tissues.
Tom Deerinck, National Center for Microscopy and Imaging Research (NCMIR)
Tom Deerinck and Mark Ellisman, NCMIR
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