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.
Self-priming of HIV-1 (−) ssDNA. A) Folding of (−) ssDNA into three hairpins [37]; in the 5′ to 3′ direction, the three shades of blue indicate the u5, cpoly(A) and cTAR domains; the r region is composed of cpoly(A) and cTAR domains. B) Elongation of (−) ssDNA in the presence of RT and dNTPs; the green line indicates the extended DNA strand. The figure is not drawn to scale.
