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Figure 12
2FoFc electron (gray) and nuclear FoFc OMIT (magenta) density maps of the DFPase active-site environment. W33 is clearly identified as a water molecule and not a hydroxide, and is situated in an orientation that maximizes hydrogen-bonding interactions. The Ca—O—D angle is 53°. Reprinted with permission from Blum et al. (2009BB9), Proc. Natl Acad. Sci. USA, 106, 713–718. Copyright (2009) National Academy of Sciences.

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