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  • The protein that masks the active binding sites for myosin on the actin filaments isOption: 1 Meromyosin<div class='qna-optio

The protein that masks the active binding sites for myosin on the actin filaments is

Option: 1

Meromyosin


Option: 2

Myoglobin


Option: 3

Troponin


Option: 4

Both a and b


Answers (1)

best_answer

 

 

Structure of Contractile Proteins -

Actin Filament:

  • Each actin (thin) filament is made of two ‘F’ (filamentous) actins helically wound to each other. 
  • Each ‘F’ actin is a polymer of monomeric ‘G’ (Globular) actins. 
  • Two filaments of another protein, tropomyosin also run close to the ‘F’ actins throughout its length. 
  • A complex protein Troponin is distributed at regular intervals on the tropomyosin (which bears actin-binding sites)
  • In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments.

In the resting state a subunit of troponin masks the active binding sites for myosin on the actin filaments. Hence, the corret option is troponin

Posted by

HARSH KANKARIA

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