FIG. 35.

The position of the scaffolding protein in the procapsid of the bacteriophage P22 scaffolding mutant is shown in outer surface and cut-open views of the reconstruction. (A) Outer surface of the structure; the density attributed to the internal scaffolding protein is colored white whereas that of the coat protein is colored yellow. One copy of each of the seven quasi-equivalent coat proteins is highlighted in a different color. (B) Cut-open view shows the distribution of the scaffolding protein (white) which extends to a radius of 206 Å within the outer layer (yellow). Adapted from reference 308 with the permission of the author and the publisher.