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A sensitive method for rapid angiogenin (Ang) detection based on fluorescence resonance energy transfer (FRET) has been described. A dual-labeled probe based on high affinity aptamer for Ang was constructed. As donor and acceptor, 6-carboxyfluorescein (FAM) and 6-carboxy-tetramethylrhodamine (TMR) were labeled at 5′- and 3′-termini of the aptamer probe, respectively. The dual-labeled probe showed...
The specific interaction between angiogenin and aptamer has been investigated by using AFM. The specificity of the interaction is revealed by comparing the binding probability of aptamer to other elements in a series of control experiments. The results have shown that there is specific interaction force between angiogenin and aptamer. Moreover, the single molecular pull-off force between angiogenin...
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