Filamentous protein - Are of 3 types based on their diameter. Diameter Microfilaments Intermediate filaments Microtubules <8 nm 8 - 25 nm >25 nm Function Involved in contractility Provide structural suppo Involved in motility (beating of cilia, flagella) Examples Actin Vimentin, keratin, Desmin. Tubulin (a & b tubulin constitutes microtubules)
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