Fig. 1. Distance tree summarizing the phylogeny of adenovirus hexon genes. Members of the various genera are indicated in different colours, and viruses that belong to the same species are grouped by light-green ovals. Abbreviations of virus names are indicated at the ends of the branches, with species names listed to the right (recognized species in italics): B, bovine; C, canine; D, duck; E, equine; F, fowl; Fr, frog; H, human; M, murine; O, ovine; P, porcine; Po, possum; Sn, snake; T, turkey; and TS, tree shrew. The distance matrix was calculated from amino acid sequences for hexon available in GenBank (in some cases combined from different partial entries) and from our unpublished sequences. The PROTDIST (Dayhoff PAM 001 matrix) and FITCH (global rearrangements) programs of the PHYLIP package, version 3.6, were used. The tree was rooted by specifying sturgeon adenovirus as the outgroup and displayed using TREEVIEW (Page, 1996). Bootstrap values of less than 80/100 (not including branches within species) are indicated by small, filled circles.

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