Creative Peptides offers HLA-A_11_01 EBV EBNA3B 416-424 tetramer-IVTDFSVIK-PE labeled which can be used for direct detection of antigen specific T cells. Visit
https://www.creative-peptides.com/product/hla-a-ebv-ebna3b-tetramer-ivtdfsvik-pe-labeled-item-cpm-1-0038-33878.html for more information.