FIG 1 .

Comparison of amino acid sequences from positions 510 to 597 of the hemagglutinin protein of canine distemper virus isolates from felids (accession numbers JN812975, AB619774, JF810109, GU001863, Z47763, Z54166, Z54156, KC579363, and KC579362). Isolates from captive animals are denoted by [C], and the date in parentheses is the date of sampling. Variable residues are highlighted (gray), and sites 530G and 549Y, previously thought to be important for spillover into noncanid hosts, are highlighted yellow.