Figure 2

Principal component analysis of HP proteins isolated from AAG, DU and GC patients. (A) Score plot showing an overview of the proteins. Each circle represents a protein. The ellipse represents a 95% significance level. Proteins outliers can either be very strongly differentially expressed proteins or mismatched spots. (B) Loading plot showing an overview of the spot maps from the three groups AAG, DU and GC. Each circle represents a spot map. The ellipse groups the five spot maps from AAG, which can be separated from DU and GC ones and only one DU sample (4Cgel8). AAG-associated HP spot maps are displayed in black; those from GC and DU are displayed in red and blue, respectively. For each spot map, abbreviations indicate the identifier of the patients reported in Table 3 and include the diagnosis (AAG, GC, DU), the stomach location of HP isolation (a, antrum; c, corpus), and a superscript gel number in the Deyder work flow.