FIG. 1.

Comparison of the predicted amino acid sequences of the Ad9, Ad19, Ad15, Ad17, and Ad28 fiber polypeptides. The numbering on the left takes into account the deletions which resulted from the alignment. The structural domains tail, shaft, and knob and the eight repeating motifs in the shaft region are marked by arrows. Amino acids identical to the amino acids presented in the preceding sequence are marked by asterisks; plus signs indicate homology to Ad9; number signs indicate homology to Ad19; and deletions are represented by dashes. Subg., subgenus. The amino acid residues which were exchanged between Ad9, Ad3, Ad17, and Ad28 are underlined and written in bold (the Ad3 knob sequence is shown in Fig. 2).