[1] Univ Heidelberg, Dept Neurobiol, D-69120 Heidelberg, Germany
[2] Kobe Pharmaceut Univ, Dept Biochem, Kobe, Hyogo 6588558, Japan
[3] CNRS, Ctr Neurochim, Lab Neurobiol Dev & Regenerat, UPR 1352, F-67084 Strasbourg, France
[4] Univ Strasbourg 1, F-67084 Strasbourg, France