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Figure 2.
Figure 2. Schematic diagram showing the folding
topology of the d(G-C-G-G-T3-G-C-G-G) quadruplex
in Na
+
containing solution. The backbone tracing of
individual hairpins is shown by thick lines and the
chain directionality by thick arrows. Hydrogen bonding
donor to acceptor directionalities around individual
G·G·G·G tetrads are represented by arrows as are
Watson-Crick G·C pairs within G·C·G·C tetrads. Syn
guanine residues are shaded to distinguish them from anti
guanine residues. The two distinct inter-strand narrow
grooves are labelled N1 and N2 while the symmetric
intra-strand wide grooves are labelled W.
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