Figure 1 - full size

 

Figure 1.
Figure 1. a, The Shaw T1 tetramer drawn in MOLSCRIPT^37 and rendered using POVRAY version 3.0. The subunit to the front is not shown for clarity. The four-fold axis is vertical down the central cavity. Layer 1 (residues 10−56) is colored in green; layer 2 (residues 57−71) in blue; layer 3 (residues 72−94) in red; and layer 4 (95−111) in yellow. Zinc atoms are shown as gray spheres. b, Stereodiagram of C traces of the superposition of the Shaw T1 (green) and Shaker T1 (magenta) structures (SETOR^ 38) in the same view as in Fig. 1a. Secondary structure elements, N- and C- termini are labeled. Arrows 1 and 2 denote two major variable regions between the two structures. The vertical line represents the four-fold axis. c, Stereodiagram of C traces of the Shaw T1 (green) and Shaker T1 (magenta) to highlight the difference in layer 4, viewed from the top of the teteramer in a direction ~45^o tilted from the four-fold axis. The vertical line in the background represents the four-fold axis.

The above figure is reprinted by permission from Macmillan Publishers Ltd: Nat Struct Biol (1999, 6, 38-43) copyright 1999.