Latex beads, amine-modified polystyrene, are widely used in biomedical research and diagnostics due to their unique surface properties. These beads are often employed as solid supports for the immobilization of biomolecules such as antibodies, antigens, and nucleic acids, making them essential in immunoassays and molecular detection techniques. Their amine groups provide reactive sites for covalent coupling with target molecules, ensuring stable and specific interactions.

In cell biology, they serve as tools for cell separation and sorting, particularly in flow cytometry and magnetic-activated cell sorting (MACS). The beads can also be used as carriers for drug delivery systems, where their surface modification allows for controlled release of therapeutic agents. Additionally, they are utilized in the development of biosensors and as calibration standards in particle size analysis due to their uniform size and surface characteristics. Their versatility and functionalizability make them valuable in both research and industrial applications.