FIGURE 3.

Sequence alignment of (A) dif, (B) cer, (C) psi, (D) Bsdif, (E) dif1, (F) attP^CTX, (G) attP^{V GJ}, (H) attP^TLC, (I) difSL and (J) difH. Dyad bases in each arm are underlined in dif. XerC and XerD cleavage points are indicated by arrows, the central region is depicted in the middle of the sequence as a white box with the number of base pair corresponding to each dif site above. Left and right arms are depicted as blue boxes with their corresponding sequences for each dif site. The catalytic unit is depicted as a green box, whereas the inactivated unit is depicted as a red box. For (E–H), bases that differ from dif1 in V. cholerae are underlined and colored in red. Next to each dif alignment is the corresponding accessory protein that coordinates/activates dimer resolution.