myosin

 

What kind of filament is myosin?

Introduction. Myosin filaments (also called thick filaments) are key components of muscle and non-muscle cells. In striated muscle, they overlap with thin (actin-containing) filaments in an orderly array, making a repeating pattern of sarcomeres, the basic units of contraction [1] (Figure 1a).

 Myosin filaments consist of myosin molecules, each having a tail of length 1500 Å and two elongated globular myosin heads, each with a dimension of 150 Å (Figure 3a). Myosin molecules comprise two heavy chains and four light chains.