Figure 1

Individual arrays vs. mean of all arrays A. Scatter plot of signals from 4629 probe sets on a typical array vs. mean signals from all 12 arrays. Line of identity is shown. B. Worst-case scatter plot. Same as plot A, except vertical axis represents a different array, the one with the most consistent deviation from the mean of all 12 arrays at high expression levels. Note that almost all signals > 10⁴ arbitrary units are below the line of identity.