Light‐Induced Formation of G‐Quadruplex DNA Secondary Structures

A little light release: Temporarily blocked ("caged") dG nucleosides that can be incorporated into oligodeoxynucleotides are presented (see figure). Their hydrogen-bond-recognition site is inaccessible in the inactive form; this prevents, for example, the formation of secondary structures. Light can trigger the release of the unmodified oligonucleotide and thus induce correct folding. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2268/2005/z500198_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.