All-in-One kits are the only kits that allow you to isolate virtually 100% pure antibody conjugate without HPLC/FPLC column purification. The All-in-One Kits used for antibody labeling are the only products of their kind that convert nearly 100% of antibody to conjugate, making purification easy with the included purification spin columns. All-in-One kits are the only kits for making high yielding, pure, high-quality antibody conjugates.