Avidin Biotin

Avidin Biotin

  • Name
  • Description
  • Cat#
  • Pricings
  • Quantity
  • Avidin Biotin

  • Modified Affinity Purified Avidin
  • PRO-446
  • Shipped at Room temp.

Catalogue number



Avidin, AVD, AVID.


Avidin is a basic charged glycoprotein present in the egg white and in some extent in tissues of various animals. Avidin is a homotetrameric protein that contains 4 identical subunits which bind to Biotin with high extent of affinity and specificity consisting of 128 amino acids and has a molecular mass of about 67K Daltons.
Avidin-Biotin is a modified form of affinity purified avidin that combines the high affinity specific activity of the native egg white avidin to biotin molecule together with a very low background of the streptavidin produced by the bacteria Streptomyces avidinii.


1. Avidin-Biotin does not exhibit unwanted non-specific binding that have been previously reported for the native egg white avidin. 2. The non-specific properties of Avidin-Biotin have been tested in ELISA, Western Blot & Immunohistochemistry techniques and have been found to be superior to unmodified avidin. 3. Avidin-Biotin rarely affected by pH values between the range of pH-2 to pH-12 or by guanidine-HCl concentrations up to 8M at neutral pH.

Physical Appearance

Lyophilized freeze dry Powder.


Salt-free lyophilized powder with no preservative added.


We highly recommended to prepare a 1 mg/ml solution; Reconstitute using cold deionized pyrogen free water and mix gently until powder is completely dissolved.


Store protein solution at 2-8°C.

Biological Activity

Binding activity of Avidin-Biotin is 10-15units/mg protein. 
One unit of Avidin activity is defined as the amount of protein which will bind 1µg d-biotin.

Safety Data Sheet


ProSpec's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
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