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.
Working model of AP-1, NF-κB, and Sp1/Sp3 in predicted PRR promoter. Large open and solid black arrows refer to constitutive and regulated expression, respectively.