Background:

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.

DyLight® 488 conjugated antibodies absorb light maximally around 493 nm (± 4 nm) and fluoresce with a peak around 518 nm. They are brighter than Cy2 and FITC conjugates and similar in brightness to Alexa Fluor 488 conjugates, but typically give less background. DyLight® 488 conjugated to any antibody is recommended to maximize sensitivity for all immunofluorescence procedures requiring a green-fluorescing dye. DyLight® is a trademark of Thermo Fisher Scientific Inc. and its subsidiaries.