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. 2000 Mar 28;97(7):3171–3176. doi: 10.1073/pnas.97.7.3171

Table 1.

X-ray diffraction data statistics

Number of measured reflections 489,969
Number of independent reflections 112,293
Number of reflections with I > 3σI  79,868
Rmerge(I)* (%) 5.5
Rw(F) and Rwfree† (%)
 Spherical atom model 9.2  9.6
 Multipolar atom model 9.0  9.4
*

Rmerge(I) = Σ (n/(n − 1))1/2|I − 〈I〉|/Σ I, where n is the number of equivalent reflections measured. 

Rw(F) = [Σ w⋅(|Fobs| − |Fcalc|)2w⋅|Fobs|2]1/2, where w = 1/σ2 (Fobs).