Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Phylogenetic tree based on the capsid proteins of CaVV and 2117 strains determined using the neighbor-joining method (21). The percentages of 500 replicate trees in which the sequences clustered together are indicated at the nodes (22). Horizontal branch lengths are drawn to the scale of the number of amino acid substitutions per site (23).
