Question

what is the function of the protein called titin within a sarcomere? it binds calcium, initiating sarcomere shortening. it wraps around g actin, blocking its active sites. it attaches myosin filaments to the z lines. need help? review these concept resources. rate your confidence to submit your answe high medium reading © 2025 mcgraw hill. all rights reserved. privacy center

Explanation:

Titin is a large protein in muscle. It attaches myosin filaments to the Z - lines, providing structural support and elasticity to the sarcomere. The first option is the role of troponin (binding calcium for contraction), and the second option is the role of tropomyosin (blocking actin active sites).

Answer:

It attaches myosin filaments to the Z lines.