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. 2013 Oct 15;11:44. doi: 10.1186/1477-5956-11-44

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Copyright © 2013 Vanden Bergh et al.; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Distribution of quantity values for each protein identified by MS according to their subcellular localization. Each plot represents PMSS values for each protein identified in pellets (X-axis) and/or supernatants (SNs, Y-axis) for wt (A and B) and mutant (C and D) strains, in either the exponential phase of growth (GP, A and C) or the stationary phase (SP, B and D). Numerous cytoplasmic and periplasmic proteins were present in SNs. EF-Tu and GroEL were among the most important proteins in all pellets, but they did not show the same levels in SNs. While GroEL (a marker of cell lysis) was never present in SNs (or in a very low quantity in D), EF-Tu was abundantly identified in the SN of all conditions.