highly significantP = 4 × 10 -8
Gene enrichment analysis was performed with the ToppGene Suite [ 27 ], and showed a highly significant enrichment (hypergeometric P = 4 × 10 -8 ) for 18 genes annotated to the set of 222 genes known to be up-regulated in CD133 + relative to CD133 - hematopoietic stem cells in the 'Jaatinen_HSC_Dn' Molecular Signatures Database (MSigDB) [ 28 ] entry.