Many composite layup designs also include a co-curing or post-curing of the prepreg with various other media, such as honeycomb or foam. This is commonly called a sandwich structure. This is a more common layup for the manufacture of radomes, doors, cowlings, or non-structural parts.
Troponin is a protein that helps hold tropomyosin in place on the actin filament. A muscle contraction consists of a series of repeated events. First, calcium triggers a change in the shape of troponin and reveals the myosin-binding sites of actin beneath tropomyosin. Then, the myosin heads bind to actin and cause the actin filaments to slide. Finally, ATP breaks the actin-myosin bond and allows another myosin 'oar stroke' to occur. Repetition of these events causes a muscle to contract. Learning Outcomes. After this lesson, you'll be able to: Identify the structure of myosin and actin
References. 1  Kron SJ, and Spudich JA. Fluorescent actin filaments move on myosin fixed to a glass surface. 2  Spudich JA, Kron SJ, and Sheetz MP. Movement of myosin-coated beads on oriented filaments reconstituted from purified actin. 3  Thoresen T, Lenz M, and Gardel ML. Reconstitution of contractile actomyosin bundles.