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A9771 Sigma

Albumin–fluorescein isothiocyanate conjugate

albumin bovine

Synonym: FITC-albumin



Related Categories Biochemicals and Reagents, Cell Biology, Cell Signaling and Neuroscience, Enzyme Substrates, Enzymes, Inhibitors, and Substrates,
biological source   albumin bovine
extent of labeling   ≥7 mol FITCmol albumin
storage temp.   2-8°C


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


1, 5 g in poly bottle

50, 100, 250 mg in poly bottle

Preparation Note

Prepared from crystallized and lyophilized albumin (A 4378).

Price and Availability

Amplified Detection

All labs need water

Biomedical Applications
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 

Frequently Asked Questions

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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
What are the excitation and emission maxima for Product A9771, Albumin–fluorescein isothiocyanate conjugate (FITC-albumin)?
The excitation maximum is 495 nm and the emission maximum is 520 nm.
How is the FITC bound to the albumin in Product A9771, Albumin–fluorescein isothiocyanate conjugate (FITC-albumin)?
The FITC is bound through the epsilon amino group of the lysine amino acid residues. Each lot number will have a varying number of FITC molecules bound.
Is there any free FITC present in Product A9771, Albumin–fluorescein isothiocyanate conjugate?
We would not expect there to be free FITC. The final product is dialyzed against distilled water using dialysis tubing with a molecular weight cutoff of 12,000 prior to it being lyophilized.
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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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