DNMT3B and acute lymphoblastic leukemia: Consistent with the results in T-ALL, we found MYC to occupy the DNMT1 promoter in P493-6 cells upstream of exon 1 (relative enrichment: 1,559), and DNMT3B downstream of exon 1 (relative enrichment: 132) as well as at two more sites in the gene body, which was not covered by the promoter array analysis in mouse T-ALL.