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 (15[1])by Rickettsia, (15[1])Shigella, and (15[1])Listeria via namesake (*) “comet tails” (10[1])generated (10[1])through (15[1])its explosive (15[1])polymerization. This compound is regulated by the rho GTPases, which may (15[3])cause it (15[1])to form lamellipodia or filopodia. (10[1])The (10[1])Arp2/3 (10[1])complex polymerizes this (-5[1])compound’s globular G form to (10[1])produce its filamentous F form. This compound forms microfilaments, which along with microtubules make (10[1])up the cytoskeleton. For 10 points, name (10[1])this protein (-5[1])that alternates with myosin (10[1])in muscle (10[3])fibers. ■END■ (10[1])