Expression of 5′ and 3′ fusion partner genes during normal ontogeny. Unsupervised clustering of gene expression data from (A) mouse and (B) human hematopoietic cells. Kinase genes are highlighted in red. CLP, common lymphoid progenitor; CMP, common myeloid progenitor; DC, dendritic cell; GMP, granulocyte monocyte progenitor; HPC, hematopoietic progenitor cell; HSC, hematopoietic stem cell; MEP, megakaryocyte-erythroid progenitor; mono, CD14+ monocyte; NK, natural killer.