In the Sarcomere Which Elastic Protein Attaches the Thick Filament

Question

In the sarcomere which elastic protein attaches the thick filament to the Z line?
A) titin
B) actin
C) G actin
D) nebulin
E) myosin

Accepted Answer

Titin is the largest protein in the body and serves as a molecular spring in sarcomeres. Its N-terminus attaches to the Z line and its C-terminus attaches to the thick filament, specifically the myosin-binding region on the myosin protein.