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Which of these is not a component of the thin filament?

Which of these is not a component of the thin filament? Correct Answer LMM

The thin filament or the actin filament is composed of two filaments of ‘F’ actin wound helically to each other. ‘F’ actin is a polymer of monomeric ‘G’ actins. The proteins troponin and tropomyosin are also present.

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