Fig. 7

Two-dimensional polyacrylamide gel electrophoresis (PAGE) analysis of salt stress response. a 2D–gel profile of Frankia sp. strain CcI6 under control (no stress), 200 mM NaCl, and 200 mM sucrose stress conditions. b 2D–gel profile of Frankia casurainae strain CcI3 under control (no stress), 200 mM NaCl, and 200 mM sucrose stress conditions. Red arrows indicate that proteins are upregulated relative to the control, while yellow arrows indicate down regulated proteins relative to the control. The corresponding number spots were in-gel digested with trypsin and analyzed by liquid chromatography-mass spectrometry (LC-MS) and LC-MS/MS for protein identification