Robert Ernst1,2, Mike F. Renne1,2, Aamna Jain1,2 and Alexander von der Malsburg1,2 1Medical Biochemistry and Molecular Biology, Medical Faculty, Saarland University, 66421 Homburg, Germany 2Preclinical Center for Molecular Signaling (PZMS), Medical Faculty, Saarland University, 66421 Homburg, Germany Correspondence: robert.ernst{at}uks.eu