A. Note that in Figure 1746, troponin molecules are evenly spaced along an actin filament, with one
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A. Note that in Figure 17−46, troponin molecules are evenly spaced along an actin filament, with one troponin found every seventh actin molecule. How do you suppose troponin molecules can be positioned regularly? What does this tell you about the binding of troponin to actin filaments?
B. What do you suppose would happen if you mixed actin filaments with
(i) Troponin alone
(ii) Tropomyosin alone
(iii) Troponin plus tropomyosin, and then added myosin? Would theCeffect be dependent on Ca2+?
Figure 17−46
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A The regular positioning of troponin molecules along an actin filament suggests that there is a specific binding interaction between troponin and act...View the full answer
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Related Book For 
Essential Cell Biology
ISBN: 9780393680362
5th Edition
Authors: Bruce Alberts, Karen Hopkin, Alexander Johnson, David Morgan, Martin Raff, Keith Roberts, Peter Walter
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