Latex beads, amine-modified polystyrene, are widely used in biomedical research and diagnostics. They serve as solid supports for the immobilization of biomolecules such as antibodies, antigens, and DNA due to their amine functional groups, which facilitate covalent bonding. These beads are essential in immunoassays, including ELISA and flow cytometry, for detecting and quantifying specific proteins or cells. In cell separation and sorting applications, they are employed to isolate target cells by binding to specific surface markers. Additionally, they are used in diagnostic kits for rapid and accurate detection of pathogens or biomarkers in clinical samples. Their uniform size and surface modification make them ideal for calibration standards in particle size analysis and microscopy. In drug delivery systems, these beads can be functionalized to carry therapeutic agents, enabling targeted release. They are also utilized in research for studying cell interactions, protein binding, and molecular recognition processes. Their versatility and stability make them a valuable tool in both scientific and medical fields.