The Journal of Neuroscience has received a report describing an investigation by Universidade de Lisboa, which found substantial data misrepresentation in the article “Modulation of GABA Transport by Adenosine A1R–A2AR Heteromers, Which Are Coupled to Both Gs- and Gi/o-Proteins” by Sofia Cristóvão-Ferreira, Gemma Navarro, Marc Brugarolas, Kamil Pérez-Capote, Sandra H. Vaz, Giorgia Fattorini, Fiorenzo Conti, Carmen Lluis, Joaquim A. Ribeiro, Peter J. McCormick, Vicent Casadó, Rafael Franco, and Ana M. Sebastião, which appeared on pages 15629–15639 of the November 2, 2011 issue. Because the results cannot be considered reliable, The Journal is retracting the paper.