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.
Key residues in the 32i (a) and 228i (b) states at the end of the refinements by Protocol II (green) and Protocol III (magenta), together with the σA-weighted 2Fo-Fc electron density map contoured at 3.5σ level. The waters that deviate more from the densities were refined with Protocol III.
