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.
Structures for the residues Ala40, Lys41, part of Arg39, and two discrete water molecules refined with QM (cyan) and EH (magenta) at w X-ray = 0.2, together with the forces (cyan and magenta cylinders with arrowheads) on the Cβ, Cγ, and Cδ atoms of Lys41 derived from the respective E chem. All the aliphatic hydrogen atoms are omitted.
