Fig. 2.

Schematic diagram comparing the order of the protease (open box), scaffolding (cross hatched) and capsid (dotted) activities in the genomes of HK97 and P2 (drawn to scale). In HK97, the gene encoding the protease (gp4) precedes the gene for the capsid protein (gp5), which incorporates an N-terminal scaffolding domain. In P2, the protease and scaffolding activities are both contained within the gpO protein. The last line represents any of the various constructs that were made by fusing the C-terminal scaffolding domain of O with the N capsid gene