In Candida albicans, expression of the Hwp1 gene has a “fast” phase that is dependent on this compound after a “slow” phase that is independent of this compound. DNA and this compound from the host organism are incorporated into the protective biofilm formed by Pseudomonas aeruginosa. This compound is used for rapid propulsion by Rickettsia, Shigella, and Listeria via namesake (*) “comet tails” generated through its explosive polymerization. This (10[1])compound (10[1])is regulated by the rho GTPases, which may cause it to form lamellipodia or (10[1])filopodia. The Arp2/3 complex polymerizes this compound’s globular G form to produce its filamentous F form. This compound forms microfilaments, which along with microtubules make up the cytoskeleton. For 10 points, name this protein that alternates with myosin (10[1])in muscle fibers. (10[1])■END■