We have distributed resources developed in our lab around the world. Protein Monovalent streptavidin protein (J Mol Biol 2014 and Nature Methods 2006) is available for the academic community as a resource from our lab. There is no need to collaborate and no price charged for the materials, but you will need to pay for shipping. Please e-mail Mark with a very brief description of the application and why you expect that regular streptavidin will not suffice. Traptavidin protein is available here. Plasmids The following plasmids we have given to the plasmid repository Addgene for easy distribution to academic laboratories. For those in the UK, we can send plasmids to you directly if you prefer. Non-academics should contact Mark or the Oxford University technology transfer office, Isis Innovation. Feel free to e-mail for comments or advice. Traptavidin, a mutant of streptavidin with lower off-rate, increased thermostability, and greater mechanical strength. Monovalent streptavidin and cis or trans Divalent streptavidin: Alive-H6 or Alive-E6 and Dead or Dead-Aspartate loop  subunits (J Mol Biol 2014 and Nature Methods 2006) SpyAvidin subunits: Dead-SpyCatcher, Dead-SpyTag, Traptavidin-E6 SpyTag-MBP for irreversible peptide-protein ligation SpyCatcher for irreversible peptide-protein ligation SpyCatcher EQ as a non-reactive control for SpyCatcher SpyLigase for peptide-peptide ligation, and SUMO-KTag as a positive-control substrate for SpyLigase SpyTag-β-lactamase-SpyCatcher, for enzyme cyclization: through CPEC one can insert other enzymes in this scaffold
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