FIG. 24.

The change in the adenovirus penton base upon the removal of the fiber is shown by a comparison of cryoreconstructions of the dodecahedral structure formed by expressed Ad3 pentons. The structure of the dodecamer with the fiber attached is shown in blue for comparison with the fiberless structure shown in red. The top row shows a surface view (left) and sections through the surface for the two structures viewed from the side. The center of the virion would be toward the bottom of the page. The bottom row shows a surface view from the outside of the structure (left) and sections through the protrusions at the edge of the base and through the widest portion of the base. Reproduced from reference 267 with the permission of the author and the publisher.