micromer® particles can be offered with the nickel(II) chelator nitrilotriacetic acid (NTA) for the binding of histidine labeled proteins in the size range of 1 µm to 10 µm. Recombinant proteins containing a 6xhistidine-tag can be purified by Ni-NTA (nickel-nitrilotriacetic acid) chromatography which is based on the interaction between a transition Ni2+ ion immobilized on the particle matrix and the histidine side chains. Following washing of the matrix 6xhistidine-tag fusion proteins can be eluted by adding free imidazole or EDTA or by reducing the pH.

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