A7419 Sigma


buffered aqueous solution



Related Categories Antibodies, Antibody Conjugates, Avidin Reagents, Biotin/Avidin, Molecular Biology,
biological source   Avidin from egg white
  Peroxidase from horseradish
form   buffered aqueous solution
application(s)   indirect ELISA: 1:100,000
  western blot: 1:400,000-1:800,000 using detecting β-Actin in total cell extract of HeLa cells (5-10 μg/well)
conjugate   peroxidase conjugate
shipped in   dry ice
storage temp.   −20°C


Preparation Note

Affinity purified protein.

Physical form

Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 0.01% thimerosal.


Avidin-Peroxidase has been used for ELISA applications. The product can also be used for western blot applications at dilutions ranging from 1:400,000 to 1:800,000.

Western blot analysis of proteins in HUVEC cells that had underwent cell surface biotinylation were detected using HRP-conjugated avidin at 33.3 ng/ml.

General description

Avidin is homotetrameric protein (68kDa) obtained from egg whites and binds strongly to biotin. Thus, avidin-biotin association has been utilized in immunoassays to detect the localization of antigens in tissues. The use of avidin-biotin immunoassay enhances the sensitivity of the technique and facilitates the detection of antigens in low quantities.

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Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Protocols & Articles


Antibody Basics

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