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SBP-tag
The Streptavidin-Binding Peptide (SBP)-Tag is a 38-amino acid sequence that may be engineered into recombinant proteins. Recombinant proteins containing the SBP-Tag bind to streptavidin and this property may be utilized in specific purification, detection or immobilization strategies. The sequence of the SBP tag is MDEKTTGWRGGHVVEGLAGELEQLRARLEHHPQGQREP.〔 ==Discovery== The Streptavidin-Binding Peptide was discovered within a library of seven trillion stochastically-generated peptides using the in vitro selection technique of mRNA Display. Selection was performed by incubating with streptavidin-agarose followed by elution with biotin. The SBP-Tag has been shown to bind streptavidin with an equilibrium dissociation constant of 2.5nM〔 and is readily eluted with biotin under native conditions.〔〔
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