Ethidium Bromide Fluorescence

[Carmelo]

In article (Dans l'article)
<60805a5e.0107250646.1292beb7 at posting.google.com>, Bill Atkins
<billatkins at bigfoot.com> wrote (écrivait) :

> Why does ethidium bromide only fluoresce in the prescense of DNA?
> 
> Thanks,
> Bill

Hello Bill,

Something to do with changes in the electric dipole transition moment
(movement of charge density from the ground to the excited state) of
EtBr once stacked between the bases?

Carmelo