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.
Entry and exit points of the Ω-loop cavity (red surface). Entry and exit point P1 is located at the flexible tip of the Ω-loop (cyan). Entry and exit point P2 is a temporarily formed opening lined by Ω-loop residues Arg164, Glu171, Ile173, Asp176, and Arg178.
