Fueled up: The protonation of the imino group of cytosines in double-stranded DNA, which is required for the formation of a triplex, can be used to guide the assembly/disassembly of DNA-conjugated gold nanoparticles. The reversible switching of the nanoparticles is demonstrated by repeated cycling of pH between 5.0 and 6.5 with the proton as a fuel (see picture).
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Jung et al. (2006) studied this question.
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