Fig. 2

GO enrichment analysis of 125 differentially expressed proteins. The abscissa represents enriched GO function classifications, which are divided into three major categories: biological process (BP), molecular function (MF) and cellular component (CC). The ordinate represents the number of different proteins under each functional classification. The colour bars represent the significance of the enriched GO functional classification. The colour gradient represents the size of the p value (p < 0.05). The label at the top of the bar graph shows the enrichment factor (richFactor ≤ 1), which represents the ratio of the number of differentially expressed proteins annotated to a certain GO functional category to the number of identified proteins annotated to that GO functional category