Fluorescence assays are a type of biochemical assay that involve the detection and measurement of fluorescence emitted by a fluorescent molecule. This technique is commonly used in various research areas, including biochemistry, molecular biology, and drug discovery. Fluorescence assays are often used to quantify the concentration of specific molecules in a sample, monitor enzymatic activity, study protein-protein interactions, and detect the presence of certain biomolecules. The assay typically involves labeling the target molecule with a fluorescent dye or using a fluorescently-labeled probe that binds to the target molecule, and then measuring the emitted fluorescence using a fluorescence spectrophotometer. This fluorescence signal can provide valuable information about the properties and behavior of the target molecule, making fluorescence assays a versatile and powerful tool in scientific research.