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.
Snapshots of systems with polar and charged residues that
display
formation of the water defects when amino acids are positioned: at
the membrane center - charged Arg (A) and near the membrane center
- polar Asn (B).