1. Department of Applied Microbiology; Institute of Microbiology, Faculty of Biology; University of Warsaw; Ilji Miecznikowa 1 Warsaw 02-096 Poland
2. Mass Spectrometry Laboratory; Institute of Biochemistry and Biophysics; Polish Academy of Sciences; Pawińskiego 5a Warsaw 02-106 Poland
3. Institute of Genetics and Biotechnology; Faculty of Biology; University of Warsaw; Pawińskiego 5a Warsaw 02-106 Poland
4. Max von Pettenkofer Institute for Hygiene and Medical Microbiology; Ludwig Maximilians University; Pettenkoferstrasse 9a Munich 80336 Germany