Antigen Reactivity
Antigen Reactivity - Related Videos
05:04
Viral Antigen Microarray Assay to Detect Antibody Isotypes in Serum Against Viral Antigen
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2025
In this video, we demonstrate the process for detecting antibody isotypes in multiple human serum samples using a microarray slide printed with antigenic subtypes of influenza virus strains.
05:59
Determining the Reactivity and Titre of Serum using a Haemagglutination Assay
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Cited by 3 •
2010
Haemagglutination is a form of agglutination where antibodies bind to red blood cells. Red blood cells are both readily available and the results are readily observable using the naked eye. This video demonstrates the steps involved in a haemagglutination assay, interpreting the results and determining the titre.
06:57
Development of an Antigen-driven Colitis Model to Study Presentation of Antigens by Antigen Presenting Cells to T Cells
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Cited by 9 •
2016
In this antigen-driven colitis model, OT-II CD4+ T cells expressing a red fluorescent protein were adoptively transferred into RAG-/- mice that express a green fluorescent protein in mononuclear phagocytes (MPs). The hosts were challenged with Escherichia coli (E.coli) expressing the ovalbumin protein (OVA) fused to a cyan fluorescent protein (CFP).
09:08
Detecting Reactive Oxygen Species
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2023
Reactive oxygen species are chemically active, oxygen-derived molecules capable of oxidizing other molecules. Because of their reactive nature, there are many deleterious effects associated with unchecked ROS production, including structural damage to DNA and other biological molecules. However, ROS can also be mediators of physiological signaling. There is accumulating evidence that ROS play significant roles in everything from activation of transcription factors to the mediation of...
03:24
Organelle Dynamics in B Lymphocytes following Activation with Antigen-Coated Beads
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2025
In this video, we describe a method to study the organelle dynamics in B lymphocytes following their activation with antigen-coated microbeads.
FAQs
An epitope’s molecular structure determines how well it complements a binding site on an antibody or T-cell receptor. Hydrogen bonds, electrostatic forces, and hydrophobic effects act together as noncovalent contributors to the interaction. A close structural fit can increase binding affinity and selectivity, whereas altered complementarity can weaken recognition, helping explain differences among immune responses.
Strength and selectivity describe related but distinct features of immune binding. Affinity reflects how strongly an antigenic epitope interacts with its complementary site, while selectivity reflects how preferentially that interaction occurs with the matching immune component. Molecular structure influences both properties, so evaluating them together helps distinguish meaningful recognition from broader or nonspecific binding.
Specific and nonspecific binding can lead to different interpretations of an immune assay or interaction study. Separating them helps determine whether an observed response reflects selective recognition of an antigenic epitope or a less specific interaction. This distinction is therefore important when characterizing immune responses, assessing antigen-antibody binding, and interpreting experimental findings.
Assessment centers on examining antigen-antibody interactions and determining whether observed binding is specific or nonspecific. Investigators use this information to characterize the immune response and evaluate binding affinity, rather than treating every interaction as equivalent. The resulting interpretation can clarify how well a tested antigen engages an immune component and whether the observed reactivity is selective.
In diagnostic testing, antigen reactivity helps assess whether an immune component recognizes a target with the expected specificity. In vaccine evaluation, the same analysis supports characterization of the immune response generated against an antigen. These uses connect molecular binding behavior with practical assessment, while affinity and selectivity provide important context for interpreting the resulting immune interactions.
Patterns of antigen reactivity can be examined in studies of infection, autoimmunity, and immune-mediated disease. Researchers can compare how immune components interact with antigens and use the findings to characterize response patterns or distinguish specific from nonspecific binding. This makes reactivity analysis useful for connecting molecular recognition with broader questions about disease-associated immune activity.