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.

Question

Quizplus · 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.

The Function of the Titin Protein Is to