Excimer formation by stacking G-quadruplex blocks
Journal article published in 2013 by
Nguyen Thuan Dao,
Reinhard Haselsberger,
Maria-Elisabeth Michel-Beyerle,
Anh Tuân Phan 
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Abstract
A special stack: In the presence of K(+) ions, a specific guanine-rich DNA sequence forms a stacked G-quadruplex dimer giving rise to excimer emission in the 400 nm region. This emission with nanosecond lifetime occurs only for a particular base overlap pattern between two stacked G-quadruplex blocks and can be manipulated by changing DNA sequence and external conditions.