Fig. 2
From: Extending rule-based methods to model molecular geometry and 3D model resolution
Rule-based modeling with steric effects. a Circles represent a possible region of steric hindrance around the yellow/orange binding region where the radius of the circle represents the cutoff distance d c . b Types of curvature on the Pen a 1 molecule, visualized split into two strands. Accessibility to the regions may be affected when neighboring regions are occupied depending on either positive curvature (top), or negative curvature (bottom)