Figure 2.

Convex hull representations of protein volumes. Four proteins of different sizes and shapes are depicted showing the relationship of a convex hull model to atomic space filling and backbone ribbon models. The left vertical column gives the PDB ID and molecular mass for each protein. The second vertical column shows an atomic sphere representation; the third column shows backbone cartoon diagram representations for each protein (blue online) enclosed by its semitransparent initial convex hull (gray online); the right vertical panel shows the convex hull model as a solid. This figure was created in PyMOL. The transparent and solid convex hull planes are CGOs created within PyMOL by using the convex hull vertices. A PyMOL script to generate these CGOs is included with the HullRad code. CGO, compiled graphic object. To see this figure in color, go online.