Photocontrolled Binding
and Binding-Controlled Photochromism
within Anthracene-Modified DNA
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Abstract
Modified DNA strands undergo a reversible light-induced
reaction
involving the intramolecular photodimerization of two appended anthracene
tags. The photodimers exhibit markedly different binding behavior
toward a complementary strand that depends on the number of bases
between the modified positions. By preforming the duplex, photochromism
can be suppressed, illustrating dual-mode gated behavior