Appearing as the striation in cardiac and voluntary muscles, for 10 points, name this basic unit of the muscular myofibril.
The smaller subunits in these structures have a structural protein known as nebulin and are bound by the protein CapZ. These bodies' namesake reticula release a chemical that forces exposure of cross binding sites on a protein bound to tropomyosin dimmers; that chemical is calcium and that protein is actin. These structures' centers are in a region named for the German for bright, the H-zone, and are known as M-lines. Titin binds the thick filaments comprising theses structures to the I-band Z-lines that they lie between. Appearing as the striation in cardiac and voluntary muscles, for 10 points, name this basic unit of the muscular myofibril.
The smaller subunits in these structures have a structural protein known as nebulin and are bound by the protein CapZ.
{sarcomere}s