Titin’s regulated integration and mobility after cell fusion support syncytium formation in culture, while limited diffusion in vivo highlights a key challenge for developing effective cell-based ...

In a resting sarcomere, tropomyosin blocks the binding of myosin to actin. In the above analogy of pulling shelves, tropomyosin would get in the way of your hand as it tried to hold the actin rope.

(A) The basic organization of a sarcomere subregion, showing the centralized location of myosin (A band). Actin and the z discs are shown in red. (B) A conceptual diagram representing the ...