Here, we showed for the first time that co-expression of VGLUT1 and VGAT is a widespread phenomenon, and that the co-localization of the two vesicular transporters is not markedly different between the two species, an observation that might be of some help for studying the role of VGLUT1/VGAT co-expression in animal models of neurological and psychiatric diseases. The gene discussed is SLC17A7; the disease is psychiatric disorder.