PAX9 and acute lymphoblastic leukemia: For example, we detected subtype-specific loops and expression patterns in the MEF2C locus in ETP and the PAX9 locus in the non-ETP ALL samples, respectively, which were associated with H3K27ac marks in the ETP ALL sample 077, ETP ALL cell line KE37, and non-ETP ALL cell line Jurkat (Fig. 2f, g).