Figure 2.

Computational model geometry. (A) Geometry of two interacting subunits with the bond vectors depicted as arrows and attractors colored teal. The angle between each of the subunit bond vectors is 108°, and the interactions are described in the Appendix (Eqs. (16)). The dihedral angle ${\varphi }_{ij}^b$ is not shown. (B) The complete capsid, which contains 20 subunits arranged with icosahedral symmetry. (C) Critical nucleus for binding of assembly-inactive subunits in the ‘Induced Fit’ model.