Sarcomeresare the fundamental contractile unit of skeletal muscle and are characterized by their highly ordered appearance under a polarizing light microscope
Thick filaments in the A bandare composed primarily of the protein myosin.

Each myosin moleculeis composed of
Two monomers
Four monomers
Six monomers
Seven monomers
Sarcomeresare the fundamental contractile unit of skeletal muscle and are characterized by their highly ordered appearance under a polarizing light microscope
Thick filaments
Thick filaments in the A band are composed primarily of the protein myosin. Each myosin molecule is composed of six monomers: two protein strands intertwined in a helical arrangement (termed heavy chains) and four smaller, globular proteins (termed myosin light chains).
Thin filaments
Thin filaments are composed of three primary proteins: actin, tropomyosin, and troponin