Statistics for data collection, phasing, and model refinement.

aData collected at the Sector 23-ID-D of the Advanced Photon Source. bNumbers in parentheses indicate the highest resolution shell of 20. cRmerge = Σh Σi |I(h)i–<I(h)>|/Σh ΣiI(h)i, where I(h) is the observed intensity of reflection h, and <I(h)> is the average intensity obtained from multiple measurements. dFigure of merit = <|Σ P(α)eiα/Σ P(α)|>, where α is the phase angle and P(α) is the phase probability distribution. eRwork = Σ | |Fo|–|Fc| |/Σ |Fo|, where |Fo| is the observed structure factor amplitude and |Fc| is the calculated structure factor amplitude. fRfree = R-factor based on 5.0% of the data excluded from refinement. Statistics for data collection, phasing, and model refinement.