Complex sentence: Nucleation factors are enhancers of actin polymerization and contribute to the formation of the trimeric polymerization nucleus, a structure required to initiate the process of actin filament polymerization in a stable and efficient way.
Split into simpler sentences: Nucleation factors are enhancers of actin polymerization and contribute to the formation of the trimeric polymerization nucleus. This is a structure required to initiate the process of actin filament polymerization in a stable and efficient way.