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Figure 2
The architecture and crystal packing of ten analyzed DNA 18-mers. (a) The duplexes have the overall shape of the A-form. The two symmetry-related strands are colored blue and red, the two central nucleotides are depicted in green and the yellow spheres are Sr2+ cations. (b) The crystal packing. Two duplexes whose atoms are closer than 4.0 Å are highlighted in red and blue; all duplexes in gray are further than 4.0 Å from these two duplexes. Images were drawn for Chom-18-AC (PDB entry 7z7l) using ChimeraX (Pettersen et al., 2021BB22).

Journal logoSTRUCTURAL
ISSN: 2059-7983
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