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Figure 1 | Genome Biology

Figure 1

From: Model selection and efficiency testing for normalization of cDNA microarray data

Figure 1

Intensity and spatial distribution of raw log intensity ratios M of slide 3 of the SW480/620 experiment. (a) The MA-plot indicates a strong bias towards the Cy3 channel for low spot intensities A. (b) The spatial MXY-plot shows uneven distribution of positive M (red squares) and negative M (green squares). The columns with consistently negative M correspond to empty control spots. The axis labels X and Y refer to the spot location as determined by the QuantArray scanning software.

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