Figure 6-4: Symmetry mismatch between the prohead and connector potentiates connector rotation and DNA translocation. Due to the 5-6 mismatch, only a single vertex of each component is aligned at any one time (a), thus facilitating rotation. If the contact point becomes a lever for translation of the connector with respect to the prohead (*), rotation can be driven by successive events around the subunits. If the connector acts like a nut and the DNA helix like a threaded bolt, connector rotation could displace the DNA into the prohead (b). Reproduced from Hendrix, 1978, with permission. (for better image quality, click here for tif image, which may be quite large; may also require screen refreshing plus special software to view; or view larger tif in separate window)

Figure 6-1, Figure 6-2, Figure 6-3, Figure 6-4, Figure 6-5, Figure 6-6, Figure 6-7

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