DNM1L and acute lymphoblastic leukemia: Post-translational regulations are known to influence mitochondrial dynamics, among which phosphorylation of Drp1 S616 promotes mitochondrial fission, whereas phosphorylation of Drp1 S637 induces mitochondrial fusion.29 Thus, we determined the levels of Drp1 phosphorylated at S616 and S637 in primary T-ALL cells cultured with or without MSCs.