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the binding of calcium to the regulatory protein troponin increases the affinity of neighboring troponin molecules for calcium in skeletal muscles. this is an example of group of answer choices a) allosteric modulation b) cooperativity c) covalent modulation d) phosphorylation e) saturation

Answer :

Correct option b) Cooperativity.

Visualization of troponin on actin filaments (F-actin). Troponin performs a principal position withinside the calcium-law of muscle contraction: Troponin is the only calcium-binding aspect of skinny filaments (actin-tropomyosin-troponin complicated) of striated muscles.

The binding of calcium ions to troponin C triggers vertebrate striated (skeletal or cardiac) muscle contraction via a chain of interactions related to the regulatory proteins which includes tropomyosin and troponin that modify the interplay among actin and myosin. calcium reasons a shift withinside the function of the troponin complicated on actin filaments, which exposes myosin-binding sites .

Myosin sure through ADP and inorganic phosphate (Pi) can then shape cross-bridges with actin, and the discharge of ADP and Pi produces the electricity stroke that drives contraction.

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