Figure 4 - full size

Figure 4.
Figure 4. Overall structures of (a) CsE-v3, (b) Bj-xtrIT and (c) AaHII, viewed in the same orientation. Structural elements of Bj-xtrIT are in the same color scheme as in Figure 2. On each panel, the disulfide bridges are numbered 1-3 for conserved and, 4 for nonconserved (see text and Figure 2). The figure was prepared using the program MOLSCRIPT [45].