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Protein Production & Assays

The Strep-tag® system is based on one of the strongest non-covalent interactions in nature, which is the interaction of biotin to streptavidin. The system includes two affinity tags: Strep-tag®II is a synthetic peptide consisting of eight amino acids and Twin-Strep-tag® consists of two Strep-tag®II sequences in series. This peptide sequences exhibit intrinsic affinity towards Strep-Tactin® and Strep-Tactin®XT, two specifically engineered streptavidin variants. IBA provides all you need for working with the Strep-tag® system: