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. Author manuscript; available in PMC: 2013 Jan 1.
Published in final edited form as: Methods. 2011 Dec 2;56(1):33–43. doi: 10.1016/j.ymeth.2011.11.007

Figure 4.

Figure 4

(a) Longitudinal section of rigor insect flight muscle, showing alternating thick and thin filaments with crossbridges joining them; M-line at top, protein black. (b) Class average of one chevron-like structure similar to those in (a) calculated from tomogram of rapidly frozen muscle, showing interpretation in terms of “lead” and “rear” heads (those closer to and further from the pointed end of the thin filament, respectively). The central filament is actin with partial myosin filaments on either side. After [72], with permission. Scale bar = 100 nm.