The following books and articles on Hawk's Nest Tunnel Disaster can be found at the West Virginia Archives and History Library. BOOKS. Cherniack, Martin. The Hawk's Nest Incident; America's Worst Industrial Disaster. New Haven, Connecticut, Yale University Press, 1986. 363.179 C521.
There are three different types of myofilaments: thick, thin, and elastic filaments. Thick filaments consist primarily of the protein myosin. Each thick filament is approximately 15 nm in diameter, and each is made of several hundred molecules of myosin. A myosin molecule is shaped like a golf club, with a tail formed of two intertwined chains and a double globular head projecting from it at an angle.
http://www.sci.sdsu.edu/movies/actin_myosin_gif.html. Thick filament (MYOSIN) Thin Filament (Actin) The 2 heads link the actin and myosin together during contraction. The ends of a myosin filament contain the heads & there is a central bare area. The heads contain ATP binding sites. Active sites are blocked when the muscle is relaxed.