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.
Retroviral capsid assembly and budding strategies. Schematic illustration of the capsid assembly and budding strategies of C-type (human immunodeficiency virus type 1, HIV-1), B/D-type (Mason-Pfizer monkey virus, MPMV), and foamy viruses (prototype foamy virus, PFV).
