subsequent formation of a potent transmembrane Na+ ion transporter. Olefin metathesis is
used to cross-link all 16 guanosine subunits in a lipophilic G-quadruplex. The resulting
unimolecular G-quadruplex folds in the environment of a phospholipid membrane and
functions as a Na+ ion transporter as judged by fluorescence and 23Na NMR transport
assays.