Review Article

Single-Stranded DNA Aptamers against Pathogens and Toxins: Identification and Biosensing Applications

Figure 4

Illustration of examples of ssDNA MRE based fluorescent biosensors. (a) A representation of the changes in fluorescent signal upon target binding to a fluorophore labeled MRE. (b) A representation of an “on-mode” system by using a quencher labeled on the complementary sequence.
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(b)