There are several isoforms of actin and myosin, reflecting their diverse functions in different cell types. For instance, α-actin is predominantly found in muscle cells, whereas β- and γ-actin are present in non-muscle cells. Myosin also has various classes, with Myosin II being the most well-known, involved in muscle contraction, while other classes like Myosin V are involved in cargo transport within cells.
