Figure 1. HK97 capsid assembly pathway and gene map.
(a). A schematic view of HK97 capsid assembly showing how three HK97 proteins form a transient Prohead I, which is converted to Prohead II by the action of the co-assembled protease subunits. The proheads particles used in this study were made by expressing the proteins from plasmids and did not contain portals. Particles with no portal have 12 pentamers (b). Map of the 3 contiguous HK97 capsid genes.