Francesc Baixauli1, Matteo Villa1, Erika L Pearce2. 1. Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany. 2. Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, 79108 Freiburg, Germany. pearce@ie-freiburg.mpg.de.