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Figure 3
Density slices from (a) a binary model mask and (b) the corresponding Gaussian model mask (the polynomial model mask is similar and is not shown) derived from test model 1exr . The coloring scheme is from red (zero density) through white (0.5 density level) to blue (1.0 density level). Below each density slice is a one-dimensional representation of the mask for each case, given a single atom at the origin. The distance from the atom in Å is given on the x axis and the y axis depicts the relative electron density of the mask. In (d), the Gaussian model (A = 11.5 Å, σ = 0.55 times the van der Waals radius) is shown in blue and the polynomial model (a set to the van der Waals radius, w = 0.8 Å) is shown in magenta given an atom with a van der Waals radius of 1.75 Å.

Journal logoBIOLOGICAL
ISSN: 1399-0047
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