Latex beads, carboxylate-modified polystyrene, are widely used in biomedical research and diagnostics. They serve as essential tools in immunoassays, where they act as solid supports for the immobilization of antibodies or antigens, enabling the detection of specific biomolecules. These beads are also employed in flow cytometry for cell sorting and analysis, as their uniform size and surface properties allow for precise labeling and detection. In addition, they are utilized in drug delivery systems, where their carboxylate groups facilitate the conjugation of therapeutic agents, enhancing targeted delivery. Furthermore, these beads are applied in molecular biology for DNA and protein separation, leveraging their surface charge and modification for efficient binding and isolation. Their versatility and functional properties make them valuable in various scientific and medical applications.