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Figure 7
Difference electron-density maps calculated by FFT through the RIDL pipeline (Fobs,n − Fobs,1-type maps) contoured for the seventh, 13th, 19th and 31st data sets at 3.0σ and −3.0σ levels in green and red, respectively. Electron-density loss around the phosphate moieties of nucleotides G5 and G6 indicates the occurrence of P—O and C—O bond breaks, while the aromatic groups show only minor changes in electron density (arrows). Atoms are shown as follows: carbon, sky blue for the DNA chain; phosphorus, orange; oxygen, red; nitrogen, dark blue. Nucleotides are labelled with one-letter codes. P atoms are labelled in italics.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 4| July 2019| Pages 998-1009
https://doi.org/10.1107/S160057751900763X
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