The Strep tag is a peptide sequence that is able to mimic biotin's ability to bind to streptavidin. Sequences of Strep tags from 0 to 5 have been appended to the N-terminus of a model protein, the Stefin A Quadruple Mutant (SQM) peptide aptamer scaffold, and the recombinant fusion proteins expressed. The affinities of the proteins for streptavidin have been assessed as a function of the number of tags inserted using a variety of labelled and label-free bioanalytical and surface based methods ...Expand abstract
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Optimisation of a multivalent Strep tag for protein detection.
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