An official website of the United States government
Here's how you know
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.
Diagram of the infectivity assay. Details of the assay are described in Materials and Methods. Plasmids are represented by circles with an arrow to highlight the promoter for T7 RNA polymerase (T7 pro). vTF7-3, is a recombinant vaccinia virus expressing T7 RNA polymerase.