Effect of the normalization and analysis approach on dataset IV. Effect of the normalization and analysis approach on the results on gene expression derived from dataset IV which includes 178 genes up-regulated in sample 1 and 178 genes equally transcribed. Genes are classified as equally expressed (○), and up or down-regulated (●). Number of genes is reported for each category. Crosses (+) show the intensities of genomic controls. The cut-off values for the posterior probability of equal expression were 0.01 for ArrayLeaRNA and 0.99 and 0.01 for OpWise.