NME1 and leukemia: Nucleoside diphosphate kinase-A has been found in neuroblastoma (Okabe-Kado et al, 2005b), B and T-cell lymphoma (Niitsu et al, 2003, 2004), haematological malignancies (Okabe-Kado, 2002) and leukaemia (Niitsu et al, 2000; Okabe-Kado et al, 2002) where it induces cell proliferation (Okabe-Kado et al, 2009b) and activates cytokine production (Okabe-Kado et al, 2009a).