1. Department of Molecular Biology; Max Planck Institute for Infection Biology; D-10117; Berlin; Germany
2. Department of Core Facility Microscopy; Max Planck Institute for Infection Biology; D-10117; Berlin; Germany
3. Department of Bacteriology; Max von Pettenkofer-Institut; Ludwig-Maximilians-Universität; D-80336; Munich; Germany
4. Research Group Insect Symbiosis; Max Planck Institute for Chemical Ecology; D-07745; Jena; Germany
5. Division of Human Biology; Fred Hutchinson Cancer Research Center; Seattle; WA; 98109; USA