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.
Interhelical and intrahelical interactions in CrgA. (A) Interhelical interface with a “knobs-in-holes” pattern involving complementary large and small side chains on the two helices. (B) Interhelical and intrahelical side-chain–backbone hydrogen bonds.
