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.
The schematic representation of a consecutive pair of strandons at the edge of the sheets (a) and strandon interlock in a supermotif (b) consists of two consecutive pairs of strandons: J, J + 1 and K, K + 1. The open rectangles denote strandons.
