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.
Close-up from the same image series as shown in Video 1 but highlighting an example for a single particle that is recruited to the ER surface.
