Palindromic sequences binding
FIGURE 4.20 Cruciform Structure Formed from an Inverted Repeat
Because the DNA is palindromic, the strands can separate and base pair with themselves to form lateral cruciform extensions.
FIGURE 4.21 Comparison of B-DNA, A-DNA and Z-DNA
Several structurally different versions of the double helix exist. Shown here are the normal Watson-Crick double helix, the B-form, together with the rarer A-form and Z-DNA form. From left to right: stereoscopic skeleton pairs, end view down the helix axis, and space filling models. Courtesy of Tamar Schlick.
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