Example of gene query to the HemaExplorer Web server. (A) Web server interface for single gene lookup with gene query, options for dataset and scale of axis. (B) Output plot from the Web server displaying gene expression for the ERG transcription factor in the normal myeloid system. CMP indicates common myeloid progenitor cell; GMP, granulocyte monocyte progenitors; HSC_BM, hematopoietic stem cells from bone marrow; MEP, megakaryocyte-erythroid progenitor cell; MY_BM, myelocyte from bone marrow; PMN_BM, polymorphonuclear cells from bone marrow; PMN_PB, polymorphonuclear cells from peripheral blood; PM_BM, promyelocyte from bone marrow; and early HPC_BM, hematopoietic progenitor cells from bone marrow.