Human tetramers - Class I - BV421

Human tetramers - Class I - BV421


Preparation of MHC Class I Tetramer Reagents

MHC class I tetramer reagents are generated primarily using the method developed by Altman et al., who demonstrated that tetramers of MHC class I/peptide complexes could be used as probes for detection and quantitation of antigen-specific CTL (Science 1996, 274: 94-96)
E. coli-expressed recombinant MHC class I heavy chain and β2-microglobulin (β2m) are folded in the presence of a peptide antigen to generate a soluble monomeric MHC class I/peptide complex (monomer). The monomer is then biotinylated by the biotin ligase enzyme, BirA, at a lysine residue present in the biotinylation sequence that has been added to the C-terminus of MHC class I heavy chain. The biotinylated monomer is purified by column chromatography. Purified biotinylated monomers are tetramerized by mixing with a fluorescently-labeled streptavidin to make MHC tetramer reagents.

MHC tetramers are labeled with fluorescent molecules including phycoerythrin (PE), allophycocyanin (APC), or Brilliant Violet 421 (BV421) and thus allow detection of antigen-specific T cells by flow cytometry or fluorescence microscopy.

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  • BV421 26
  • human 26
  • human 26
  • Protein/peptide 26
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