Primary Antibody
Primary Antibody - Related Videos
05:31
A Multiplex Immunostaining Method Using Primary Antibodies from the Same Host Species
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2025
This video demonstrates an assay to perform multiplex immunostaining using primary antibodies from the same host species. In this method, an adrenal tissue section undergoes a two-step immunostaining process. Initially, the section is stained with antibodies specific for markers in the cortex, followed by stripping the bound antibody and restaining with antibodies specific for markers in the medulla.
03:18
Antibody-Dependent Enhancement of Zika Virus by Dengue Antibodies in Human Primary Macrophages
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2026
Source: Asad, S., et al. Quantification of Antibody-dependent Enhancement of the Zika Virus in Primary Human Cells. J. Vis. Exp. (2019)This video demonstrates antibody-dependent enhancement of Zika virus infection in human primary macrophages, using dengue antibody–virus complexes to model how cross-reactive antibodies facilitate Fcγ receptor–mediated viral entry and replication for studying infection mechanisms and immune interactions.
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...
07:53
Quantification of Antibody-dependent Enhancement of the Zika Virus in Primary Human Cells
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Cited by 1 •
2019
We describe a method to evaluate the effect of pre-existing immunity against dengue virus on the Zika virus infection by using human serum, primary human cells, and infection quantification by quantitative real-time polymerase chain reaction.
01:10
Antibody Structure
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2019
Overview Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding. The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains Antibodies consist of four polypeptide chains: two identical heavy...
FAQs
A primary antibody’s binding sites recognize features of the chosen antigen, including its shape or sequence. This molecular fit allows the antibody to distinguish the intended target from other components in a biological sample. Because the assay signal depends on that recognition event, binding specificity affects whether protein localization or abundance measurements support a reliable biological interpretation.
A labeled secondary antibody can bind the primary antibody after the target-recognition step. This creates a route to amplify or visualize the signal without requiring the target-binding reagent itself to carry the detectable label. In practice, that arrangement helps reveal where the primary antibody has bound and supports readouts in several antibody-based assays.
The antibody’s specificity and overall performance are not merely technical details; they shape the accuracy of the assay. A result may be used to identify a protein, compare its abundance, or examine a cellular process, so the reagent must produce information that corresponds to the intended molecular target. This makes antibody performance central to interpreting experimental outcomes.
An experiment typically starts by selecting a primary antibody against the antigen of interest, then applying it in an assay suited to the research question. The bound antibody is detected, often through a labeled secondary antibody. The resulting signal can then help identify the target, locate it, or assess its relative abundance.
Immunofluorescence and immunohistochemistry are especially useful when the goal is to locate a protein, whereas Western blotting and ELISA support comparisons of protein abundance. The primary antibody provides target recognition in each format, but the assay determines how that recognition becomes an interpretable result. Selection therefore depends on whether location or abundance is the main question.
By marking a defined molecular target, primary antibodies connect molecular recognition with broader biological questions. Researchers can use them to examine where proteins occur, compare how much target is present across samples, and investigate cellular processes associated with those patterns. These applications help link protein-level observations from antibody-based assays to broader biological interpretation.