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.
Numerous genes encoding components of DNA damage repair and checkpoint pathways are activated in old cells. Data plotted are the ratios of values for old (O) vs. young (Y) cells and represent the average values from duplicate hybridizations. The list includes genes that vary by at least twofold.
