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 relationship based on pol gene (1302 nt) sequences (shown in red and green color) and global HIV-1 subtype reference sequences (A1, A2, HXB2, C India, C Zambia, C Ethiopia, C Brazil, D, F, G, H J, and K from Los Alamos HIV Sequence Database).
