RAG1 and neoplasm: To assess the impact of tumor-specific T cells on the growth of KPN1.1 tumors, we transplanted KPN1.1 tumors into C57BL/6J, Rag1−/−, “4get” GFP-tolerant mice, or NINJA(F) mice, which express NINJA in all tissues and are tolerant to GFP and the neoantigens) (Damo et al., 2020).