Four best CASP predictions of phage T5 tail tip complex (H1060v0, pb6-pb6-p140-p132-pb9) aligned on the experimental structure, in which the different proteins are coloured as in FIGURE 2. A, Side view of the complex and B, central slice of the complex. Top views of the different rings of the complex from its top to its bottom with C, a first, and D, second trimers of pb6, E, the p140 trimer (inner ring) and p132 dodecamer (outer ring) and F, the pb9 hexamer.