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.
(a) DBP and NBP retrieved by SiteMap analysis; (b) point of view of DBP; (c) point of view of NBP. The phobic surfaces are reported in yellow, the HB acceptor surfaces are reported in red, HB donor surfaces are reported in blue, the surfaces of the two pockets are reported in grey.
