Figure 8-4: O_R:O_L interaction. One possible set of interactions between CI bound at O_L and O_R. On the left is shown an interaction involving dimers bound at each of four sites. The intervening 2.4 kb form a loop (indicated by the dashed arc). This structure would form from a non-looped structure (not shown) by cooperative interactions between tetramers at each site. Both P_L and P_R are presumed to be repressed in this structure, as they would be in the absence of looping when CI binds. On the right is a complex containing additional dimers bound to O_R3 and O_L3; in this complex, P_RM is repressed. Other complexes may also form; for instance, the O_L region might be inverted from the orientation shown. (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 8-1, Figure 8-2, Figure 8-3, Figure 8-4

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