Gene expression of Avp, Hcrt, and Pmch. While little difference in expression among these genes is shown in the GNF mouse tissue atlas, the ABA images offer a better resolution and suggest Avp may play a different biological role than Hcrt and Pmch. The black boxes outline the brain hypothalamus region. Avp expression is concentrated in a specific hypothalamus region called periventricular region, while expressions of Hcrt and Pmch are largely concentrated in a different hypothalamus region called lateral hypothalamic area. Brain images were obtained from the ABA database and the tissue gene expression data were obtained from GNF SymAtlas.