RAG1 and acute lymphoblastic leukemia: Interestingly, rag1, which is associated with immature lymphocytes, had higher expression in T-ALLs, while notch1a and lmo2, which are associated with both B and T lineages, were expressed at higher levels among the B-ALL and E::R;pax5mut zebrafish (Figure 5, Figure S13, and Table S7).