Reengineered streptavidin mutants bind biotin-4-fluorescein with extremely tight yet reversible binding affinity. The terrifically tight noncovalent interaction between biotin and streptavidin has ...
The cost of making a Phycoerythrin conjugated tetramer is $800. The most expensive reagents are the biotin ligase (BirA from Avidity, LLC) and the PE-conjugated streptavidin (Prozyme). On occasion, it ...