Latex beads, amine-modified polystyrene, are widely used in biomedical research and diagnostics due to their ability to bind biomolecules. They serve as solid supports for immobilizing proteins, antibodies, and nucleic acids, making them essential in immunoassays, such as ELISA, for detecting specific antigens or antibodies. These beads are also employed in cell separation techniques, where their surface modifications allow for selective binding to target cells. In flow cytometry, they act as calibration standards to ensure accurate instrument performance. Additionally, their use in drug delivery systems is explored, where they can carry therapeutic agents to specific sites in the body. Their uniform size and surface properties make them valuable in various scientific and medical applications.