Latex beads, amine-modified polystyrene, are widely used in biomedical research and diagnostics due to their unique surface properties. They serve as solid supports for immobilizing biomolecules like proteins, antibodies, and nucleic acids, making them essential in immunoassays, such as ELISA and lateral flow tests. These beads are also employed in cell separation techniques, where their amine groups facilitate the binding of specific cell types for isolation and analysis. In drug delivery systems, they act as carriers for targeted release of therapeutic agents. Additionally, their use in flow cytometry as calibration standards ensures accurate instrument performance. Their versatility and functionalizability make them valuable tools in both research and clinical applications.