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.
Laser direct-write of mouse ES cells in spotted arrays with cell density on the ribbon of (a) 5 × 106 cells/ml, and (b) 2 × 106 cells/ml. Scale bar = 200 µm.