Figure 5

Comparing the spread of expression values across the IHF dataset [22]after BABAR and limma -normalisation. The figures plot M-values versus microarray identity (see Figure 4 legend for details). Gene expression values were obtained after processing with BABAR (with no final centering; A), limma quantile normalisation (B) and limma scale normalisation (C). Each box highlights the median and characterises the range of 50% of the data for each microarray; circles show individual genes that are outliers.