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Antigen Antibody Interaction Kit

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This lab activity is designed to study highly specific lock-key matching properties of antigen-antibody and how this highly specific interaction can be exploited as a tool for research and analysis. This study involves the use of an immunodiffusion technique in which antigen and antibody are allowed to diffuse in a solid agarose medium. 


When antigen and antibody meet, antigen-antibody complex is formed, which leads to precipitation. Antigen-antibody precipitate is formed in the zone where the concentration of the two matching pair reaches an optimal known as the zone of equivalence, which results in formation of a visible opaque precipitate region in agarose medium. Those regions of precipitation can be used for determination of concentration or titer of both antigen and antibody. 


The Antigen-Antibody Interaction kit is a hands-on study of both Ouchterlony Double Diffusion and Radial Immunodiffusion techniques. This kit also provides additional guidance materials for teaching other types of antigen-antibody interactions concepts such as immunoelectro- phoresis and immunoprecipitation.  


Supplied with components needed for hands-on experimentation for six workstations of 4-5 students or 24-30 students. Supplied with Teacher’s Guide and separate Student’s Guides.  



  • Specific properties of antigen & antibody.
  • Antigen-antibody diffusion, interaction, and complex formation.
  • Teaches Ouchterlony Double Diffusion and Radial Immunodiffusion.
  • Application of antigen-antibody interaction in research laboratories.




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Antigen Antibody Interaction , For 6 groups of 4-5 or 24-30 students.
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