Figure 4.
DNA structures in solution of (A) 0.01 mM spermine and (B) 0.5 mM As+.
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.