ABPs function by binding to actin filaments (F-actin) or actin monomers (G-actin), modulating their polymerization, depolymerization, stabilization, and branching. For instance, profilin binds to actin monomers and facilitates their addition to the growing end of actin filaments, thus promoting polymerization. Conversely, cofilin binds to actin filaments and enhances their disassembly, thereby increasing the turnover rate of actin filaments.
