[1] Max Planck Inst Infektionsbiol, Mol Biol Abt, Dept Mol Biol, D-10117 Berlin, Germany
[2] Max Planck Inst Infektionsbiol, Cent Core Facil Prot Anal, D-10117 Berlin, Germany
[3] Max Planck Inst Infektionsbiol, Cent Core Facil Microscopy, D-10117 Berlin, Germany