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Long threads made of actin are called ___

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The answer is Microfilaments
User Eddy Freddy
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Answer:

Microfilaments are fine, thread-like protein fibers, 3-6 nm in diameter. They are composed predominantly of a contractile protein called actin, which is the most abundant cellular protein. Microfilaments' association with the protein myosin is responsible for muscle contraction.

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User Chrisg
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