Differential expression of the proteins composing the core C. pseudotuberculosis exoproteome, evaluated by label-free relative quantification using LC-MSE. Results are shown as natural log scale of the relative quantifications (1002:C231) for each protein. Only proteins that were given a variation score higher than 250 by PLGS quantification algorithm are presented. Proteins regulated more than 2-fold in each strain are indicated. Protein identification numbers correspond to additional files 2 and 7: Tables S1 and S4.