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Figure 5.
The zinc finger motif of Nei. An electron density map is shown around the bound
zinc atom [`omit' map at contour levels of 5 [220]{sigma} (blue), and 17 {sigma}
(green)]. The four Cys residues (with typical Zn-S bond lengths of 2.28-2.38 Å) are shown
in a ball-and-stick representation and the two anti-parallel ß-strands are shown in a
ribbon diagram (beige). Superimposed on this region is the corresponding region of the
Nei-DNA complex (red), demonstrating a movement of the tip of the zinc finger between the
free and the DNA-bound forms of the enzyme.
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