Figure 1.

Structural elements of L1 important for papillomavirus particle assembly. A) The top view of an L1 pentamer, showing the lateral projections from each of the five monomers (each in a discreet color). B) A close-up view of the lateral projections two monomers, showing the detailed positions of h2, h3, h4, and h5 at the C-terminus of L1. C) The inter-pentameric helix-helix interactions between two pentamers in the T = 1 particle. The h4 of one pentamer (in yellow) interacts with h2 and h3 of another pentamer (in pink).