Latex beads, amine-modified polystyrene, are widely used in biomedical research and diagnostics. They serve as solid supports for the immobilization of proteins, antibodies, and nucleic acids, making them essential in immunoassays and molecular detection techniques. Their amine groups enable covalent coupling with biomolecules, enhancing sensitivity and specificity in assays like ELISA and flow cytometry. These beads are also employed in cell separation and sorting processes, where they bind to specific cell surface markers. Additionally, they are utilized in drug delivery systems, where their surface modification allows for targeted release of therapeutic agents. In material science, they act as model colloids for studying particle interactions and self-assembly phenomena.