FIG. 3.

A bar graph that compares the gene expression fold changes identified by DNA microarrays and quantitative RT-PCR analysis. Six upregulated genes and six downregulated genes were compared. The fold changes were converted into log₂ values for comparison. Standard deviation error bars for each mean are presented. SE, S. Enteritidis PT4; ST, S. Typhimurium LT2; 30, the weak chlorine treatment (130 ppm for 30 min); 10, the strong chlorine treatment (390 ppm for 10 min); microarray, the fold change identified by microarray; RT-PCR, the fold change identified by qRT-PCR.