UltraAvidin™ — CF®647

UltraAvidin is Leinco Technologies' trademark for a uniquely modified form of avidin which is isolated from chicken egg whites. With a molecular weight of 60,000 there are four identical subunits each capable of binding one molecule of biotin. UltraAvidin from Leinco Technologies has been de-glycosylated to prevent carbohydrate moieties from adhering to lectin-like receptors on the surface of cells, thus eliminating the possibility of false positives. Unlike native avidin, UltraAvidin has a near neutral pI which prevents electrostatic interactions with negatively charged serum or membrane proteins.

This CF®647 conjugate is formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.4, 1% BSA and 0.09% sodium azide as a preservative.

Keep the avidin— CF®647 solution undiluted at 2°–8°C. Protect from prolonged light exposure and do not freeze.

2-8°C

Flow Cytometry Staining: Use ≤ 0.125 µg of reagent per million cells in a 100 µl volume. For optimal performance, titrate the reagent for your specific application.

1. Wilchek, M. et al.(1990) Biochem Biophys Res Commun. 1990 170(3):1236-41.
2. Sullivan, W. et al. (1996) Genetics. 143(4):1629-42.