Used extensively in biochemical research for labeling proteins and other biomolecules, enabling the study of molecular interactions and cellular processes. It is particularly valuable in techniques like affinity chromatography, where it helps isolate and purify specific molecules by leveraging the strong biotin-streptavidin interaction. Additionally, it plays a crucial role in diagnostic assays, enhancing the detection of target analytes with high sensitivity and specificity. Its applications also extend to drug delivery systems, where it facilitates targeted delivery of therapeutic agents to specific cells or tissues.