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Streptavidin Conjugates


Many investigators prefer to use streptavidin rather than avidin as probes for biotin conjugated antibodies. Avidin (from egg white) is a glycoprotein with histone-like characteristics and a high isoelectric point(pI~10). Streptavidin lacks the glycoprotein constituent, has a much lower isoelectric point(pI~5), and is less likely to cause non-specific reactions. PROTOS IMMUNORESEARCH provides a variety of streptavidin conjugates. Streptavidin-peroxidase is available for ELISA, immunohistochemistry and immunoblotting. Streptavidin-fluorescein, -rhodamine, -Texas Red and ‑R.Phycoerythrin suitable for use in immunofluorescence microscopy, flow cytometry and FACS analysis. Streptavidin-R.Phycoerythrin is particularly suited for assays involving bead-bound biotinylated analytes.

Streptavidin (Streptomyces avidinii)

Conjugate
Catalog No.
Size
Price
Unconjugated
674
1 mg
$75.-
FITC
675
1 mg

$110.-

Rhodamine (TMRITC)
676
1 mg
$110.-
Peroxidase
681
1 mg
$120.-
R-Phycoerythrin
683
1 mg
$170.-

 

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