Fig 5. Timeline of important evolutionary events in the demographic history of Tibetans.
The horizontal axis represents the estimated time of events (in years) in the past. The age of the EGLN1 D4E mutation is based on previous estimates.
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.