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.
Alteration of a significantly short, single-well H-bond (OTyrZ–ND1-His190 = 2.47 Å) to a standard, asymmetric double-well H-bond (2.71 Å) upon removal of water molecules near the water-splitting catalytic site, Mn4CaO5 in PSII. (Online version in colour.)
