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.
Structure of HET-s(218–289) and positions of mutated residues. Model is from the solid-state NMR structure (PDB ID code 2kj3). Green, buried polar residues; red and blue, positive and negative salt-bridge residues, respectively; purple, asparagine ladders; and black, flexible loop.
