Figure 4.

Organizations of head assembly genes in different viruses (virus name abbreviations according to Fig. 1 ▶). Each gene is represented by a rectangular bar with the gene name on it. Genes are shaded according to their functions. The different shadings of HK97 gene 5 and c2 l5 N-terminal parts indicate their putative roles as scaffolding protein or protease, respectively. The dotted lines in Mu and HSV-1 diagrams indicate omitted genes. The diagrams for T4, λ, HK97, and T7 are adapted with modifications from Duda et al. (1995) with permission from Elsevier © 1995. Functional assignments for Mu and HSV-1 genes are according to Grimaud (1996), Morgan et al. (2002), Sheaffer et al. (2000), Newcomb et al. (2001), and Perelygina et al. (2003). The assignment of Mu gpH as portal protein is speculative.