Antibody Purification
Antibody Purification - Related Videos
03:22
Production and Purification of Recombinant Antibodies from Mammalian Cells
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2025
The video explains the process of producing antibodies in mammalian host cells, from gene expression to secretion. It involves transcription, translation, signal recognition, correct folding, and eventual release into the extracellular medium via secretory vesicles.
09:54
Laboratory Scale Production and Purification of a Therapeutic Antibody
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Cited by 9 •
2017
This protocol describes the production of a therapeutic antibody in a mammalian expression system. The methods described include preparation of vector DNA, stable transfection and serum-free adaptation of a human embryonic kidney 293 cell line, set up of large scale cultures and purification using affinity chromatography.
03:03
An Affinity Chromatography Technique for the Purification of Monoclonal Antibodies
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2025
This video demonstrates a technique for purifying monoclonal antibodies from the culture supernatant obtained from an antibody-producing cell culture. The process involves using a matrix of crosslinked agarose beads with conjugated Protein A, which immobilizes the antibodies in the supernatant on the beads, allowing for effective separation from contaminants. By applying an elution buffer with low pH, the protein A-antibody interaction is loosened, facilitating the collection of...
10:38
High Yield Purification of Plasmodium falciparum Merozoites For Use in Opsonizing Antibody Assays
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Cited by 18 •
2014
Measuring antibody function is key to understanding immunity to Plasmodium falciparum malaria. This method describes the purification of viable merozoites, and measurement of opsonization-dependent phagocytosis by flow cytometry.
13:21
Antibody Generation: Producing Monoclonal Antibodies Using Hybridomas
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2023
Source: Frances V. Sjaastad1,2, Whitney Swanson2,3, and Thomas S. Griffith1,2,3,4 1 Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455 2 Center for Immunology, University of Minnesota, Minneapolis, MN 55455 3 Department of Urology, University of Minnesota, Minneapolis, MN 55455 4 Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455 Polyclonal antibodies are defined as a collection of antibodies directed against...
FAQs
Protein A and protein G bind immunoglobulins, whereas an immobilized target antigen selects antibodies that recognize that antigen. This creates two distinct purification strategies: broad antibody capture through immunoglobulin-binding ligands or enrichment of antibodies directed against a chosen antigen. The ligand therefore affects which antibody population is recovered and how useful the preparation will be for downstream immunology experiments.
Affinity purification depends on separating nonspecific material during washing and then releasing the retained antibodies during elution. Washing removes contaminants while preserving antibody binding, whereas changing pH or ionic strength enables recovery from the immobilized ligand. These conditions matter because the preparation must achieve effective recovery without compromising the purity or stability needed for later research or clinical use.
Post-capture processing can refine the preparation beyond the affinity step. Filtration, concentration, and size-exclusion chromatography are available as additional operations, and these steps can improve purity or stability. Their inclusion is especially relevant when the initial eluate requires further processing or when the antibody must be prepared at a more suitable concentration for downstream research or clinical applications.
A practical workflow begins with a biological sample or cell culture fluid, followed by loading onto an affinity medium carrying protein A, protein G, or a target antigen. Washing removes unbound contaminants, and an altered pH or ionic strength releases the retained antibodies. Filtration, concentration, or size-exclusion chromatography can then be added when greater purity or stability is required.
Target-antigen capture is particularly useful when the research question concerns antibodies directed against a defined antigen rather than immunoglobulins generally. In infection studies, this approach can support analysis of pathogen-specific immune responses. By contrast, protein A or protein G provides immunoglobulin capture without selecting the antibodies according to their recognition of the stated target antigen.
Purified antibodies provide a suitable reagent for antigen detection and diagnostics, where antibody-antigen recognition must be examined without the complexity of the original sample. They also support neutralization studies, therapeutic development, and characterization of pathogen-specific immune responses. These applications connect purification to both practical assay development and investigation of how immunity responds to infectious agents.