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.
(A) live cells with fragmented DNA showing bright green nucleus, (B) live cells with intact membrane (white arrows), (C) dead cells showing bright red nucleus, (D) live cells (white arrow heads). Bar = 5 μm.
