What is the function of CapZ and tropomodulin in the sarcomere?
A)to center myosin thick filaments
B)to attach actin thin filaments to the Z disk
C)to maintain a constant actin thin filament length
D)to make contraction sensitive to Ca²⁺

Question

Quizplus · Accepted Answer

CapZ and tropomodulin are proteins that regulate the length of the actin thin filaments in the sarcomere. CapZ is located at the barbed end of the actin filament and prevents further elongation, while tropomodulin is located at the pointed end and prevents depolymerization. Together, these proteins maintain a constant actin filament length, which is important for the proper functioning of the sarcomere.

What Is the Function of CapZ and Tropomodulin in the Sarcomere