What protein is thought to act like a "molecular ruler" by regulating the number of actin monomers that are allowed to assemble into a thin filament?
A)troponin
B)myosin
C)nebulin
D)titin
E)tropomyosin

Question

Quizplus · Accepted Answer

Nebulin is a giant protein that spans the length of the thin filament in muscle cells. It is thought to act like a "molecular ruler" by regulating the number of actin monomers that are allowed to assemble into a thin filament. Nebulin also helps to maintain the proper spacing between the actin filaments in the sarcomere.

What Protein Is Thought to Act Like a "Molecular Ruler