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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: Prog Neurobiol. 2008 Jun 20;86(2):72–127. doi: 10.1016/j.pneurobio.2008.06.004

Figure 1.

Figure 1

Thin filament structure. A. Schematic showing two actin helices (red, blue), tropomyosin (yellow), and troponin (pink) in vertebrate striated muscle and Lethocerus flight muscle. Modified from Wendt et al. (1997). B. Three dimensional electron microscopy reconstructions of thin filaments interacting with thick filaments at rest (1) and during contraction (2). Panel 3 compares tropomyosin position in panels 1 and 2. Panel 4 shows the likely myosin binding sites. Contour plot, actin; red and yellow helices, tropomyosin; blue dots, myosin binding sites. Modified from Craig and Lehman (2001); data from tarantula.

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