Abstract
Affinity chromatography is a powerful purification technique, as it allows proteins of interest to be obtained at a high degree of purity in a single step. This technique can be applied on a research laboratory scale as well as on an industrial scale. The interaction involved in affinity separation most often involves a natural ligand or an antibody specific for the protein of interest, or the recognition of a peptide tag artificially added to the recombinant protein. Unfortunately, natural ligands are not always available and it may be undesirable or impossible to add a purification tag, especially for the production of therapeutic proteins. We have developed Affitins as a new class of artificial affinity proteins that can be generated against virtually any protein of interest. Due to their very high selectivity, their remarkable robustness against extreme acid or alkaline conditions and their low production cost, Affitins are particularly suited to this technique. We describe here the production of Affitins and their immobilization on resin beads to prepare affinity chromatography columns. The protocol also describes the use of these columns.
Published Version
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