Electronic States in Stretched DNA Macromolecules
The amplitude of the electronic wavefunction of stretched poly-CG DNA
macromolecule is shown on a cylindrical surface anchored at one of
the guanine carbon atoms. The contours show the electron concentration.
Stretching of the molecule along its axis leads to significant changes
in the overlap between electrons on adjacent bases, which has a dramatic
effect on the conductivity of the structure, reducing it by as much
as 6 orders of magnitude for an elongation of 90% relative to its natural length.