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.
Purple, orange, red, and blue represent protein receptor, small drug ligand, hydrogen bond, and amino acid residue, respectively. The length of bond is added to the bond.
