Magnetic transfer immunoassay

Immunoassays can be performed on the surface of beads or other particles. The composition and size of the beads may vary depending on the application. Surface area available for the reactions is greatly increased by using beads instead of a flat surface as the solid phase. Additionally, beads can be easily transferred from one reagent to another and washing steps are rapid and convenient (e.g. beads containing metal can be transferred magnetically). 

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