Figure 3From: HOLLOW: Generating Accurate Representations of Channel and Interior Surfaces in Molecular StructuresMolecular surface grid-approximation. (A) The molecular surface (black) is defined by the atomic contact of a rolling sphere and the reentrants (dashed) resulting at the sphere contacts of multiple atoms. (B) The finite-grid approximation in HOLLOW results in a surface (blue) that closely approximates the molecular surface.Back to article page