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Figure 1
Electron-density map of the P-loop. The final σ-weighted 2Fo − Fc map contoured at 1.2σ is shown in stereo. Two putative nitrate-binding sites are also shown. C, N and O atoms are shown in yellow, blue and red, respectively.

Journal logoSTRUCTURAL BIOLOGY
COMMUNICATIONS
ISSN: 2053-230X
Volume 68| Part 5| April 2012| Pages 511-516
doi:10.1107/S1744309112010226
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