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.
A simplified evolutionary relationship between foamy viruses (left) and their vertebrate hosts (right). The scale bar indicates number of amino acid changes per site in the viruses or host speciation time (million years ago, MYA). Bootstrap support values are provided at each node. The alignment of the FV Gag-Pol-Env amino acid sequences is provided in Supplementary data set S2.
