Figure 3From: Optimization and evaluation of T7 based RNA linear amplification protocols for cDNA microarray analysisScatterplot matrix using average expression ratios of multiple replicate amplifications for each protocol and the gold standard. The X-axis and Y-axis show virtual gene expression level [normalized log(base2) fluorescence intensity ratio of sample to reference averaged over multiple arrays] measured using aRNA amplified by different protocols or unamplified poly(A)+ RNA as labelled. The last column of plots shows each amplification protocol (Y-axis) vs. gold standard (X-axis). The correlation coefficient for each pair is listed in each plot. The orange and blue shaded regions indicate more than a two-fold difference between the virtual expression values for each protocol being compared.Back to article page