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.
Time course of the relative expression levels of mRNA for 20 circadian clock genes. Expression levels of each mRNA were quantified by qPCR with two biological replicates.