The actin that makes up cytoskeleton fibers are called
microfilaments. They are the thinnest filaments of the cytoskeleton
a structure found in the cytoplasm of eukaryotic cells.Ê
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Actin and myosin are proteins. They are responsible for muscle
movement and a variety of movements of non muscle cells. For more
information visit http://www.ncbi.nlm.nih.gov/books/NBK9961/