Editing Microfilament (section)

==Organization==
Actin filaments are assembled in two general types of structures: bundles and networks.  Bundles can be composed of polar filament arrays, in which all barbed ends point to the same end of the bundle, or non-polar arrays, where the barbed ends point towards both ends. A class of [[actin-binding protein]]s, called cross-linking proteins, dictate the formation of these structures.  Cross-linking proteins determine filament orientation and spacing in the bundles and networks.  These structures are regulated by many other classes of actin-binding proteins, including motor proteins, branching proteins, severing proteins, polymerization promoters, and capping proteins.{{cn|date=June 2024}}