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.
Geometric setup used for estimates of discontinuities at the threshold boundaries. Left: Chromatin fibre showing the line along which electrostatic potential is calculated. Right: Cross-section of chromatin fibre looking down the fibre axis. The line passes through the central core as close as 3 Å from some of the atoms surrounding the core. Image rendered using VMD68
