Biotin-Z / Streptavidin-ZAP

a chemical conjugate of streptavidin and the ribosome-inactivating protein, saporin

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Streptavidin-ZAP converts biotinylated materials into targeted toxins. Streptavidin is a tetrameric protein (molecular weight 53 kDa in its recombinant form), with each subunit able to bind a single biotin molecule. The bond between streptavidin and biotin is rapid and essentially non-reversible, unaffected by most extremes of pH, organic solvents, and denaturing reagents. It is the strongest known noncovalent biological interaction (Ka = 1015 M-1) between protein and ligand. The streptavidin used to make Streptavidin-ZAP contains no carbohydrate group and has a neutral isoelectric point, which therefore reduces the nonspecific binding as compared to avidin. A variety of molecules, including lectins, proteins, and antibodies, can be biotinylated and reacted with streptavidin-labeled probes or other detection reagents for use in biological assays.


Streptavidin-ZAP Kit Components

Select a link below to reorder individual components.

ZAP product: Streptavidin-ZAP (Cat. #IT-27)   USD EURO GBP
Control: Saporin (Cat. #PR-01)   USD EURO GBP

The Biotin-Z Kit contains all the components above. Order the kit here.

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