S20-371 Direct Detection of T cell Mediated Immune Responses Using Peptide MHCs (pMHCs) Displayed on Multimeric Protein Scaffolds The recognition of peptide-MHC (pMHC) complexes by T cells is the cornerstone of cellular immunity, enabling the elimination of infected or tumoral cells. pMHC can thus be leveraged as a detection tool for T cells. Mark Davis Venkata Mallajosyula