FIG. 2.

Diagrammatic representation of the potential phylogenetic significance of similar proteins in P22 and other phages. The outermost level indicates those proteins that share >30% sequence identity. The genes on the map line correspond to proteins which share ≥60% identity, while the inner arrows refer to proteins which share ≥90% sequence identity. A single color is employed where the P22 protein has only a single homologue. In cases where similarity is to two proteins, the arrowhead and shaft are differently colored. Where homology is shared with ≥3 different phage proteins, the gene is represented in grey.