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Related Concept Videos

Protein Complexes with Interchangeable Parts01:57

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Diversity of Antigen Receptors01:28

Diversity of Antigen Receptors

Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response.
Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...

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Related Experiment Video

Updated: Jun 8, 2026

Measuring TCR-pMHC Binding In Situ using a FRET-based Microscopy Assay
19:05

Measuring TCR-pMHC Binding In Situ using a FRET-based Microscopy Assay

Published on: October 30, 2015

CD23/FcεRII: molecular multi-tasking.

M Acharya1, G Borland, A L Edkins

  • 1Division of Molecular and Cellular Biology, Faculty of Biomedical and Life Sciences, University of Glasgow, CR-UK Beatson Institute, Glasgow, UK.

Clinical and Experimental Immunology
|September 14, 2010
PubMed
Summary
This summary is machine-generated.

CD23, a receptor for immunoglobulin E, regulates IgE responses. Soluble CD23 (sCD23) proteins exhibit cytokine-like activities, and understanding CD23 interactions aids therapeutic strategies.

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IP-FCM: Immunoprecipitation Detected by Flow Cytometry
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IP-FCM: Immunoprecipitation Detected by Flow Cytometry

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Related Experiment Videos

Last Updated: Jun 8, 2026

Measuring TCR-pMHC Binding In Situ using a FRET-based Microscopy Assay
19:05

Measuring TCR-pMHC Binding In Situ using a FRET-based Microscopy Assay

Published on: October 30, 2015

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins
16:10

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins

Published on: March 22, 2012

IP-FCM: Immunoprecipitation Detected by Flow Cytometry
12:17

IP-FCM: Immunoprecipitation Detected by Flow Cytometry

Published on: December 2, 2010

Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • CD23 is the low-affinity receptor for immunoglobulin E (IgE).
  • It plays a crucial role in regulating IgE responses.
  • CD23 can be cleaved into soluble forms (sCD23) with cytokine-like activities.

Purpose of the Study:

  • To identify regions of CD23 responsible for ligand interactions.
  • To elucidate structure-function relationships within the CD23 protein.
  • To explore CD23 as a therapeutic target.

Main Methods:

  • Ligand binding assays to identify interaction regions.
  • Structural analysis of CD23.
  • Review of translational studies involving CD23.

Main Results:

  • Regions of CD23 interacting with IgE, CD21, MHC class II, and integrins were identified.
  • These findings explain CD23's structure-function relationships.
  • CD23's role in therapeutic antibody effects was highlighted.

Conclusions:

  • Understanding CD23-ligand interactions is key to its function.
  • CD23 is a credible target for therapeutic interventions.
  • CD23 is implicated in the efficacy of certain antibody therapies.