Proteins can assemble into what three things?
How can a chain of identical protein molecules form?
Why do the proteins end up arranging in a helix? What does that result in?
What is an actin filament composed of?
What do the other identical attached subunits form?
Filaments, sheets, or spheres.
By the binding site on one protein molecule being complementary to another region on the surface of another protein molecule of the same type.
Because each protein molecule is bound to its neighbor in an identical way and can extend indefineitely in either direction. Forming an extended protein filament such as actin.
Identical protein subunits.
Other sets of identical proteins associate to form tubes, microtubules of the cytoskeleton.