Used in molecular biology and biochemistry to enhance the uptake of nucleic acids into cells, particularly in transfection protocols. It facilitates the binding of DNA or RNA to the cell surface, promoting endocytosis and improving gene delivery efficiency. Commonly applied in both in vitro gene expression studies and vaccine development. Also employed in chromatography as an ion-exchange medium for protein purification due to its cationic properties. Additionally, used in some immunological assays to precipitate macromolecules or modulate immune responses.