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. 2021 Aug 27;11(18):9133–9161. doi: 10.7150/thno.61804

Figure 3.

Figure 3

Schematic representation of biosensors. A biosensor system is comprised of a biorecognition unit, a signal transductor unit, and a signal processing and data analysis unit. Analytes can be recognized by their specific antibodies, aptamers, proteins or enzymes, and even cells. If the core recognition element is an aptamer, the biosensor system can be called aptasensor.