Extended Data Fig. 1: Capsid wall viewed along the local three-fold symmetry axis.

Molecular surface (left) and diagram of protein layers (right). (a) Inner capsid layer formed by three major capsid protein subunits contributed from three adjacent capsomers, orange; (b) Middle layer containing three additional overlaying major capsid protein subunits, yellow; (c) Outer layer containing three overlaying auxiliary capsid proteins, blue. P, peripheral domain of the major capsid protein. I, insertion domain of the major capsid protein. PH, pleckstrin-homology domain of the auxiliary capsid protein. G, G-loop of the major capsid protein.