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Comparison of convex hull and ellipsoid of revolution models. (A) Tryptophan synthetase as atomic spheres (green online). (B) Shown is a DNA duplex with 24 base pairs as atomic spheres. Each molecular structure is overlaid with a semitransparent (gray online) initial convex hull (left) or prolate ellipsoid of revolution (right) of volumes and maximum lengths equal to that of the respective convex hull. To see this figure in color, go online.
