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) Hydrophobic packing within helices involving numerous leucines. Residue name and number are indicated. (B) Hydrophobic packing of the helices and the β-hairpin. Residues responsible for helix contacts with strands 1 and 2 are illustrated in yellow and red, respectively. Leu 17, showing several contacts with strand 2, is highlighted in orange. Residue name and number are indicated.
