Examples are provided by cDNA two colour arrays in which the authors identified genes differentially regulated by PAX3 or PAX3-FKHR over-expression in NIH3T3 cells [16], by Affymetrix arrays to find genes induced by PAX3 expression in a human medulloblastoma cell line [17], or by a casting approach of cyclic amplification and selection of cis-regulatory elements bound by human PAX3, PAX3-FKHR or murine Pax3 [18]. Here, FOXO1 is linked to medulloblastoma.