Expression of Hoxb5 and α-catulin genes in hematopoietic cells based on microarray transcriptome. a-catulin is enriched in HSCs; however, Hoxb5 is more specific for the HSC population. CLP, common lymphoid progenitor; CMP, common myeloid progenitor; GMP, granulocyte-monocyte progenitors; MPP, multipotent progenitors. To see this illustration in color, the reader is referred to the web version of this article at www.liebertpub.com/ars