The Function of the Titin Protein is To

Question

The function of the titin protein is to
A) stabilize the position of the contractile filaments.
B) pull Z lines together during contraction.
C) interact with actin during contraction.
D) release calcium during contraction.
E) cover the myosin binding site on the actin molecule.

Accepted Answer

The titin protein acts as a molecular spring, providing elasticity to the muscle and stabilizing the position of the contractile filaments during muscle contraction. It connects the Z lines to the M line in the sarcomere, contributing to the structure of the myofibrils. While titin does interact with other proteins during muscle contraction, its primary function is not to pull Z lines together, interact with actin, release calcium, or cover the myosin binding site.