The URLs for data presented herein are as follows:Ensembl Genome Browser, http://www.ensembl.org/index.html Gene Expression Omnibus, http://www.ncbi.nlm.nih.gov/geo/ Gene Ontology Consortium, http://www.geneontology.org/ Online Mendelian Inheritance in Man (OMIM), http://www.omim.org/ Primer3, http://frodo.wi.mit.edu/primer3/ PubMed, http://www.ncbi.nlm.nih.gov/PubMed/ RefSeq, http://www.ncbi.nlm.nih.gov/RefSeq UCSC Genome Browser, http://genome.ucsc.edu/