Thermo Scientific™

NeutrAvidin™ Protein, Maleimide-Activated

Catalog number:  31007

 Related applications:

Protein Labeling & Crosslinking

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Thermo Scientific Maleimide-Activated NeutrAvidin Protein is a specially-prepared form of avidin that decreases background in biotin-binding.

Features of NeutrAvidin Protein:

Near-neutral isoelectric point—pI = 6.3, more neutral than native avidin
Nearly devoid of glycosylation—decreased possibility of lectin binding compared to native avidin
No RYD recognition sequence—no known off-target binding domains like streptavidin
Affordable—significantly less expensive than streptavidin

NeutrAvidin Protein is deglycosylated native avidin from egg whites. Removal of the excess carbohydrate by an exclusive process yields a protein with a more neutral isoelectric point and less nonspecific binding properties. Conjugated NeutrAvidin Protein provides exceptional performance in western blot, ELISA and IHC applications that require biotin-binding probes. Assay specificity, sensitivity, and signal-to-noise ratios with NeutrAvidin Protein are generally equivalent or better than with the significantly more expensive streptavidin.

Avidin is a glycoprotein found in the egg white and tissues of birds, reptiles and amphibia. The biotin-binding protein contains four identical subunits having a combined mass of 67,000-68,000 daltons. Removing the glycosylation from avidin yields NeutrAvidin Protein with a mass of 60,000 daltons. Carbohydrate-based lectin-binding is reduced to undetectable levels, yet biotin-binding affinity is retained. NeutrAvidin Protein offers the advantages of a neutral pI to minimize nonspecific adsorption, along with lysine residues that remain available for derivatization or other customized conjugation. NeutrAvidin Protein yields the lowest nonspecific binding among the known biotin binding proteins. The specific activity for biotin-binding is approximately 14 µg/mg of protein, which is near the theoretical maximum activity.

Related Products
NeutrAvidin™ Protein
NeutrAvidin™ Protein, Horseradish Peroxidase Conjugated
NeutrAvidin™ Protein, Alkaline Phosphatase Conjugated
NeutrAvidin™ Protein, Fluorescein Conjugated
For Research Use Only. Not for use in diagnostic procedures.


Label or Dye: Streptavidin
Chemical Reactivity: Thiol
Product Line: NeutrAvidin™
Product Size: 5 mg
Solubility: Water

Contents & storage

Upon receipt store product 4°C. Product is shipped at ambient temperature.


Manuals & protocols