GenScript Ni Resin FF is a 6% highly cross-linked agarose medium covalently coupled to a chelating agent that binds Ni²⁺ by three coordination sites for high-affinity purification of polyhistidine-tagged recombinant proteins. Ni Resin FF has low Ni²⁺ leakage, high protein-binding capacity and stability, and is compatible with a wide range of additives used in protein purification. Ni Resin FF is an excellent choice for high performance purification of polyhistidine-tagged proteins.