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.
Electron microscopy of purified virus particles. Particles purified by sucrose gradient centrifugation from BSC-1 cells infected with vA5Li in the presence (vA5Li+) or absence (vA5Li−) of 50 μM IPTG were collected by high-speed centrifugation, fixed in glutaraldehyde, and embedded in Epon. Ultrathin sections were examined by electron microscopy.
