AHR and leukemia: Analyses of eight leukemia cell lines (Nalm-6, Sup-B15, REH, Molt-4, K562, HL-60, Jurkat, and B-job) revealed higher AHR expression in B-cell leukemia cells (Nalm-6, REH, and Sup-B15) than in lymphoblastoid cell lines (Fig. 2A and B).