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We have developed a colorimetric probe, based on the aggregation of gold nanoparticles (Au NPs), for the detection of DNA and for the analysis of single-nucleotide polymorphism (SNP); this probe functions through the modulation of the activity of thrombin (Thr) in the presence of bivalent thrombin-binding aptamers (TBAs). The bivalent TBAs were formed from TBA 27′ (comprising a 27-base sequence...
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