Comparative proteomics analysis of chronic atrophic gastritis: changes of protein expression in chronic atrophic gastritis without Helicobacter pylori infection. Lin Zhang, Yanhong Hou, Kai Wu and Dan Li. Braz J Med Biol Res 2012; 45: 273-283.

Figure 2. RT-PCR analysis of PSME1 and RPS12. A, Down-regulation of PSME1 in chronic atrophic gastritis (CAG) (C) tissue. RT-PCR assays were performed to confirm the differential expression of the PSME1 protein between CAG and normal (N) gastric mucosa. Amplification of PSME1 and of β2-MG acting as internal control was then carried out in a DNA thermal cycler. The bands were quantified by densitometry scanning. The relative quantification was calculated as the ratio of PSME1 expression to β2-MG expression as shown in the bar graph. B, Up-regulation of RPS12 in CAG (C) tissue compared to normal (N) mucosa. The same experimental process was performed. The relative quantification was calculated as the ratio of RPS12 expression to β2-MG expression as also shown in the bar graph.