bookmark ECR Browser Allows users to visualize and analyze evolutionary conserved regions (ECRs) in genomes of sequenced species. Since its initial implementation, when only the genomes of human and mouse were available, the ECR browser has been constantly expanding to include newly sequenced genomes, and now covers 13 species. ECR Browser provides the starting point for discovery of novel genes, identification of distant gene regulatory elements and prediction of transcription factor binding sites. The genome alignment portal of the ECR Browser also permits fast and automated alignments of any user-submitted sequence to the genome of choice. The interconnection of the ECR Browser with other DNA sequence analysis tools creates a unique portal for studying and exploring vertebrate genomes.