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. Author manuscript; available in PMC: 2014 Sep 11.
Published in final edited form as: Nature. 2010 Oct 3;468(7322):406–411. doi: 10.1038/nature09428

Figure 2.

Figure 2

Crystal structures of AlkD in complex with 3d3mA-DNA (a) and THF-DNA (b). The top of each panel shows orthogonal views of the AlkD protein (green) wrapping around the DNA duplex (gold). The modified 3d3mA and THF nucleotides are colored blue, and the opposing thymine is magenta. At the bottom, a side view of the atomic model and corresponding schematic illustrates the interactions between the modified base pairs and the protein. Dashed lines represent hydrogen bonds and wavy lines represent van der Waals interactions.