Ion exchange magnetic beads are a type of bead that can be used for various bioseparation techniques, such as protein purification and nucleic acid purification. The beads are coated with a specific ion exchange resin, such as a cation exchange resin or an anion exchange resin, which allows them to bind specific ions or molecules. The beads can then be magnetically separated from the solution, allowing for easy and efficient purification of the desired molecules. They are used in many biotechnology and life science applications.