Clusters of genes categorized by the expression patterns in purified stem and progenitor cells.

Spotfire software was used to visualize the changes in expression levels of each gene during hematopoietic development. The vertical axis represents the normalized gene expression values. (A) Representative genes that are predominantly expressed in HSCs and down-regulated in MPPs, CLPs, and CMPs. (B) Representative genes that were up-regulated in MPPs. (C) Representative genes that are highly expressed in CLPs. (D) Representative genes that are highly expressed in CMPs. See Figure 2 legend for explanation of color bar.