Figure 2.
Maximum likelihood trees of (A) all V1V2 variants, and (B) all gag variants. A GTR model of evolution with empirically determined substitution rates was assumed. Bootstrap support is shown only for major lineages.
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.