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.
Typical response to PGE2 on phenylephrine precontracted human middle cerebral artery. The figure shows concentration-dependent relaxation in response to increasing concentrations of PGE2 (0.1 nM–3 μM in half-log increments).