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Figure 3
Comparisons of measures of map quality for pairs of maps based on enantiomorphic heavy-atom substructures. For structures in nonchiral space groups, all pairs of solutions derived from enantiomorphic pairs of heavy-atom substructures were selected. The member of the pair leading to the map with the higher correlation coefficient to the corresponding model map was identified as the `correct' hand and the other as the `inverse' hand. The value of each measure of map quality for the correct hand is plotted as the abscissa in each plot and the value of the measure for the corresponding inverse hand is the ordinate. Maps based on MAD data are represented as black diamonds, those from MIR data (all maps examined in this figure are from single derivatives) are represented as red triangles and those from SAD data are represented as blue squares. (a) Skewness of electron density. (b) Contrast of electron density. (c) Correlation of local r.m.s. density. (d) Flatness of solvent region. (e) Number of regions enclosing high density. (f) Overlap of NCS-related density. (g) Phase correlation from statistical density modification. (h) R factor from statistical density modification. (i) Density truncation.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
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