Thick filaments are held in register with one another by
A) titin
B) nebulin
C) tropomyosin
D) troponin
E) tropomodulin

Question

Quizplus · Accepted Answer

Thick filaments are held in register with one another by titin, a large protein that spans the distance from the M-line to the Z-disc and maintains the structural integrity of the sarcomere. Nebulin functions to maintain the length of the thin filaments, while tropomyosin and troponin are regulatory proteins involved in muscle contraction. Tropomodulin functions to cap the pointed ends of actin filaments.

Thick Filaments Are Held in Register with One Another by