Abstract
L-DNA is the mirror-image form of natural D-DNA. We demonstrate that one left-handed G-rich sequence can form an L-DNA intramolecular G-quadruplex. Further investigation revealed that a DNAzyme formed by an L-nucleotide G-quadruplex exhibited peroxidase catalytic efficiency. The enhancement of the color change of the oxygenation product ABTS•− caused by L-nucleotide G-quadruplex formation could be clearly observed with naked eyes. This research provides a new concept for the application of the L-DNA peroxidase DNAzyme complex in nuclease-containing biological systems.
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