To further characterize the proportion of OVA‐specific CD8+ T cells in orthotopic KPC‐OVA‐Luc tumor tissues, a fluorescently labeled tetramer for the immunogenic neoantigen peptide OVA257‐264 (SIINFEKL): H‐2Kb was used to detect infiltrating CD8+ T cells expressing OVA257‐264‐specific T‐cell receptors (TCRs). Here, CD8A is linked to neoplasm.