Unformatted text preview: dynamic instability____. 4. Phallodin and cytochalasin are two drugs that act on actin filaments. What effect does each drug have on actin polymerization? Phalloidin binds to and stabilizes actin filaments Cytochalasin caps the + end of actin filaments 5. ____ topomyosin___________ blocks myosin-II heads from binding to actin filaments, and is shifted when _____ troponin __________ binds to Ca 2+ , allowing muscle contraction to occur....
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- Spring '11
- cell biology, Dr. Sarah Rothschild