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Immunoprecipitation

Immunoprecipitation

Immunoprecipitation, or IP, is a widely used technique that employs protein-antibody interactions to isolate proteins or protein complexes in their native state for studying protein-protein interactions, quaternary structures, or supramolecular complexes. Various modifications of the technique, including chromatin IP, cross-linking IP, and fluorescence IP, are commonly used.
Chromatin Immunoprecipitation
Chromatin immunoprecipitation, also known as ChIP, is used to study protein-DNA or...

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Quantification of Protein Interaction Network Dynamics using Multiplexed Co-Immunoprecipitation

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QUANTITATIVE EXPERIMENTS WITH ANTIBODIES TO SPECIFIC PRECIPITATES. II.

H P Treffers¹, M Heidelberger

¹Department of Medicine, College of Physicians and Surgeons, Columbia University, and the Presbyterian Hospital, New York City.

The Journal of Experimental Medicine

|October 30, 2009

Summary

Chicken antibodies were tested against specific precipitates from horse and rabbit antisera. Findings indicate that the antigenic specificities of antibodies are not influenced by their source or function.

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Area of Science:

Immunology
Serology
Antibody characterization

Background:

Antisera are crucial tools in immunological research, providing specific antibodies for various applications.
Understanding the antigenic specificities of antibodies is fundamental to characterizing immune responses and developing diagnostic tools.

Purpose of the Study:

To investigate whether the antigenic specificities of antibodies differ based on the animal source (horse vs. rabbit).
To determine if antibody function influences its antigenic properties.

Main Methods:

Production of specific antisera in chickens using precipitates from horse and rabbit antisera.
Quantitative analysis of antibody removal by specific precipitates from different sources.
Comparison of antibody removal efficiency between homologous and heterologous precipitates.

Main Results:

Specific precipitates from anti-pneumococcus, anti-diphtheria toxin, and anti-egg albumin horse antisera showed varying degrees of antibody removal.
Specific precipitates from anti-egg albumin, anti-pneumococcus C substance, and anti-Type II pneumococcus rabbit antisera also demonstrated antibody removal.
No cross-reactivity or antibody removal was observed between horse and rabbit specific precipitates, indicating distinct antigenic specificities.

Conclusions:

The antigenic specificities of antibodies derived from horses and rabbits are distinct and not interchangeable.
Antibody function does not appear to influence the inherent antigenic specificities of antibodies from these species.