Description_x000D_ General description_x000D_ Actin is a highly abundant and conserved protein. It can transition between the monomeric (G-actin) and filamentous (F-actin) forms, which is influenced by external factors. Actin is expressed in smooth, skeletal and cardiac muscles._x000D_ Application_x000D_ Actin from bovine muscle has been used as an internal standard and positive control during western blotting._x000D_ Biochem/physiol Actions_x000D_ Actin is involved in a wide variety of cellular processes like cell migration, phagocytosis, cell polarity and shape. It associates with myosin and aids in muscle contraction. The protein acts as a building block of microfilaments._x000D_ Physical form_x000D_ Lyophilized powder containing Tris, ATP and CaCl2