... providing some reassurance as to the accuracy of the genomic approaches. The sensitivity of the microarray method is evident from the fact that among the targets there are genes that, in normal ... long way downstream from the directactions of Ubx. The safest way to identify direct targets is to characterize the cis-regulatory elements that mediate their Hox response. The availability of ... longer, consistently show more Hox-responsive targets than the younger embryos, suggestingthat the proportion of secondary targets may be greater in the older embryos. Similarly, it should be...