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NEETZoologyLocomotion and Movement

What is the main function of the heavy meromyosin (HMM) component?

Options

  1. ATo run close to the F actins
  2. BTo act as an ATPase enzyme
  3. CTo mask the active binding sites
  4. DTo project outwards at regular distance and angle

Correct answer

B. To act as an ATPase enzyme

Step-by-step solution

.Each "F" actin is a polymer of monomeric "G" (Globular) actinsTwo filaments of another protein, tropomyosin also run close to the "F" actins throughout its length.In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.The thick filament in a myofibril is made up of many monomeric proteins called Meromyosins.The HMM component consists of the head and short arm of a meromyosin.The cross arm in the HMM component refers to the head and short arm projecting outwards

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