An azide-activated desthiobiotin labelling reagent with a hydrophilic spacer arm.

10mg £114.00

25mg £234.00

100mg £594.00

Desthiobiotin is a single-ring, sulfur-free analogue of biotin that binds to streptavidin with nearly equal specificity but less affinity than biotin (Kd = 1011 vs. 1015M, respectively). Consequently, desthiobiotinylated proteins can be eluted readily and specifically from streptavidin affinity resin using mild conditions based on competitive displacement with free biotin. For pull-down experiments with biological samples, this soft-release characteristic of desthiobiotin also helps to minimise co-purification of endogenous biotinylated molecules, which remain bound to streptavidin upon elution of the target protein complexes with free biotin.


SKU: CCR-1107
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