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 in immunoassays, such as ELISA, enabling the detection of specific antigens or antibodies. These beads are also utilized in cell separation techniques, where their surface modification allows for selective binding to target cells. In addition, they are employed in flow cytometry as calibration standards and in drug delivery systems for controlled release applications. Their uniform size and functionalized surface make them valuable tools in various scientific and medical fields.