Creative Peptides offers HLA-A_01_01 CMV pp50 tetramer-VTEHDTLLY-APC labeled which can be used for direct detection of antigen specific T cells. Visit
https://www.creative-peptides.com/product/hla-a-cmv-pp50-tetramer-vtehdtlly-apc-labeled-item-cpm-1-0035-33875.html for more information.