What is a tetramer antibody?
A tetramer assay (also known as a tetramer stain) is a procedure that uses tetrameric proteins to detect and quantify T cells that are specific for a given antigen within a blood sample.
What is MHC tetramer?
MHC tetramer technology is based on the ability of MHC-peptide complexes to recognize the antigen-specific T cells at a single cell level. This breakthrough technology enables researchers to precisely measure targeted T-cell responses in infectious diseases, cancer, and autoimmune diseases.
How does a tetramer work?
Tetramer analysis is a technique that uses MHC molecules to detect T-cells that recognize peptides or antigens from infected cells or cancerous cells. A tetramer has four MHC molecules attached to a streptavidin-coated bead. T-cells that recognize the peptide in the four MHC molecules will bind to the tetramer.
What is HLA A2 restricted?
A synthetic peptide cancer vaccine consisting of HLA-A2-restricted peptides derived from glioma-associated antigens (GAA) with potential immunostimulating and antineoplastic activities.
Can you fix tetramer stained cells?
Fixation of cells is compatible with Tetramer staining but only when fixing samples after Tetramer staining. Do not attempt to fix samples prior to Tetramer staining. Fix cells for 1-4 hours at r.t. in 1% methanol-free formalin in PBS following staining and washing. Commercial fixing kits can also be used.
Why is hemoglobin a tetramer?
Hemoglobin is a tetrameric protein that binds and transports four oxygen molecules per unit and then releases them to myoglobin. The binding of oxygen to hemoglobin is allosterically cooperative, in that the binding of each oxygen molecule facilitates the binding of the next.
How do you make a MHC tetramer?
MHC tetramers are prepared by mixing enzymatically biotinylated MHC molecules with commercial preparations of streptavidin, usually conjugated to a fluorescent phycobiliprotein such as phycoerythrin (PE) or allophycocyanin (APC).
Why is Haemoglobin a tetramer?
Is hemoglobin a tetramer?
Hemoglobin is a tetramer composed of four polypeptide chains with a heme prosthetic group, and an iron molecule. The polypeptide chains consist of two α-globin chains and two β-globin chains (Figure 3).
What is HLA antigen?
A type of molecule found on the surface of most cells in the body. Human leukocyte antigens play an important part in the body’s immune response to foreign substances. They make up a person’s tissue type, which varies from person to person.
Why is MHC restriction important?
MHC restriction is significant for T cells to function properly when it leaves the thymus because it allows T cell receptors to bind to MHC and detect cells that are infected by intracellular pathogens, viral proteins and bearing genetic defects.
What is a Dextramer?
Dextramer® reagents were designed to help researchers and clinicians worldwide to obtain high-quality results. They contain multiple binding sites and numerous fluorophores to boost avidity in binding antigen-specific T cells to isolate populations even when these are rare or have low-affinity receptors.