Additional file 1.

Boxplot of the arrays. Boxplots displaying the average log₂-ratio distribution of raw background corrected log ratios and printtiploess normalised log ratios for the Duroc (a and c, respectively) and Norwegian Landrace (b and d, respectively) arrays. After within array normalisation, the log ratios were evenly distributed around 0, indicating no need for between array normalisation.

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Moe et al. BMC Genomics 2007 8:405   doi:10.1186/1471-2164-8-405