1. School of Biological Sciences, Georgia Institute of Technology, Krone EBB, 950 Atlantic Drive NW, Atlanta, GA 30332-2000, USA
2. Laboratory for Proteomics of Supra-Organismal Systems, All-Russian Research Institute for Agricultural Microbiology, 3 Podbelskogo Sh., Pushkin, 196608 St. Petersburg, Russia
3. Faculty of Biology, St. Petersburg State University, 7/9 Universitetskaya Emb., 199034 St. Petersburg, Russia