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.
Schematic representation of structure and organization of alphoid sequences (modified from Alexandrov et al. 1993b). Arrows indicate single 171 bp monomers arranged in tandem stretches in (a) monomeric, (b) dimeric, and (c) trimeric structures. The similarity percentage between monomers has been reported on the arrows (see text for details).
