Figure 2.

Total assigned MS/MS spectra for COG-catalogued proteins that were found to be differentially expressed by a factor of at least three. C: energy production and conversion; CQ: COG functional categories C and Q (secondary metabolites biosynthesis, transport and catabolism); E: amino acid transport and metabolism; ET: COG functional categories E and T (signal transduction mechanisms); G: carbohydrate transport and metabolism; H: coenzyme transport and metabolism; J: translation, ribosomal structure and biogenesis; O: post translational modifications, protein turnover, chaperones; U: intracellular trafficking, secretion and vesicular support.