Profilin Does All of the Following Except

Multiple Choice

Profilin does all of the following except

A) competes with thymosin β4 for binding to actin monomers.
B) sequesters actin monomers to prevent any polymerization.
C) binds to formin in order to "stage" actin monomers for addition to a growing filament.
D) promotes actin monomer addition to a filament plus end.
E) Profilin does all of the above.