What are the examples of FRET-based immunosensor?

FRET-based immunosensors are used to detect pathogens such as bacteria or viruses in clinical samples. FRET-based immunosensors are also used for detecting environmental contaminants, toxins, or pollutants. For example, they are used to assess heavy metals or pesticides in water or soil samples. FRET-based immunosensors are also used for studying protein-protein interactions, such as those involved in cellular signaling pathways or disease pathways.