Protein activity and functional studies rely largely on the availability of purified target proteins. Majority of protein studies are carried out on tagged recombinant proteins expressed in various host organisms. Over 50% of these tagged recombinant proteins are expressed as fusions with poly-histidine purification tags. The small size and the mild conditions utilized during His-tagged protein purification as well as the associated low costs makes this type of fusion the most popular (and in many cases, the first tag of choice). BioVision's Ni-IDA Spin Columns are ideal for small-scale purification of these poly-histidine-tagged proteins rapidly. Each of these columns is filled with 100 μL of high performance Hi-Bind? Ni QR Aga