Researchers at the National Institutes of Health identified a collection of TCRs that exclusively recognize the common hotspot driver mutations in KRAS antigen, expressed by a variety of epithelial cancers, including pancreatic, colorectal and lung cancer. The mutated KRAS variants are recognized by the TCRs in the context of specific Class I/Class II HLA alleles. These TCRs can be used for a variety of experimental therapeutic, diagnostic and research applications.