Metazoan genomes contain arrays of highly conserved noncoding elements (HCNEs) 
that span developmental regulatory genes and define regulatory domains. We 
describe Ancora http://ancora.genereg.net, a web resource that provides data and 
tools for exploring genomic organization of HCNEs for multiple genomes. Ancora 
includes a genome browser that shows HCNE locations and features novel HCNE 
density plots as a powerful tool to discover developmental regulatory genes and 
distinguish their regulatory elements and domains.