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. 2009 Nov 11;10:372. doi: 10.1186/1471-2105-10-372

Figure 3.

Figure 3

MA-plots for two replicate arrays after (a) array-level normalization and (b) strip-level normalization. Both arrays are hybridized with RNA from Tpl2-/- macrophages after 180 mins. The horizontal axis shows A-values, the average log2-intensity for each probe, and the vertical axis shows M-values, the log-intensity ratio between the two replicate arrays for each probe. The horizontal zero line represents equality of probe intensities.