They are ideal for rapid small-scale and pilot purifications of His-tagged proteins, method development, expression trials, solubility determination and separation of the proteolytically cleaved ...

Doubly tagged recombinant proteins carrying His and Strep tags are purified using Qiagen's patented nickel-nitrilotriacetic acid (Ni-NTA) resin and Strep-Tactin (a modified streptavidin).