S4762
Estreptavidina from Streptomyces avidinii
essentially salt-free, lyophilized powder, ≥13 units/mg protein
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Nombre del producto
Estreptavidina from Streptomyces avidinii, essentially salt-free, lyophilized powder, ≥13 units/mg protein
form
essentially salt-free, lyophilized powder
specific activity
≥13 units/mg protein
mol wt
~60 kDa
capacity
4 mol/mol (Biotin)
application(s)
research pathology
storage temp.
−20°C
Quality Level
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Application
- en la funcionalización de cables
- en el enzimoinmunoanálisis absorbente (ELISA) de captura de estreptavidina
- en la preparación de microburbujas
Disclaimer
General description
Preparation Note
Clase de almacenamiento
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 or view local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
In what is Product No. S4762 soluble? And how do you recommend storing solutions of streptavidin?
This product is soluble in water or aqueous buffer (i.e., PBS) at 1 mg/mL. Solutions in PBS or water can be stored for several months at 4°C, or for more than a year as frozen aliquots.
How do I determine how many units are in a particular amount of Product No. S4762?
On the Certificate of Analysis for the product, the activity of the product per milligram can be found. This number is specific for your lot, and you must look up the Certificate of Analysis by the lot number for your particular batch of product. From this number, you can calculate how many units are in a particular weight of your product by multiplying the weight of the product by the units/mg of the product.
What is the expiration date of the Product No. S4762 in my possession?
Product No. S4762 has not been assigned an expiration date by Sigma. Streptavidin is stable. S4762 has been assigned a QC Release date as well was a Retest Date. These dates can be found on the Certificate of Analysis. The QC Release Date indicates the last date that the lot was tested and found to meet specifications, and the Retest Date indicates the next date that the lot will be tested, assuming that enough of the lot remains to perform the testing.
What is the affinity of streptavidin (e.g., Product No. S4762) for biotin?
Streptavidin binds the small molecule biotin with extraordinary affinity. The dissociation constant is KD = 4 × 10-14 M, according to N. M. Green, Methods Enzymol., 184, 51 (1990).
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