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Reference.org
Immunoprecipitation
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<p>Immunoprecipitation (IP) is the technique of <a href="/facts/Precipitation_(chemistry)/s3BgsLLY">precipitating</a> a protein <a href="/facts/Antigen/9JlAernG">antigen</a> out of solution using an <a href="/facts/Antibody/MX8pdTdP">antibody</a> that specifically binds to that particular protein. This process can be used to isolate and concentrate a particular protein from a sample containing many thousands of different proteins. Immunoprecipitation requires that the antibody be coupled to a solid <a href="/facts/Substrate_(materials_science)/LwwkV6rX">substrate</a> at some point in the procedure. </p>