This intronless gene is expressed in the hippocampus and maps close to a candidate region for several X-linked mental retardation (XLMR) syndromes. It is conserved in primates, cow, and horse, but not found in mouse and rat. The exact function of this gene is not known, but on the basis of its physical location and expression pattern, it is proposed to have an important function in the brain. [provided by RefSeq, Jan 2010].