Figure 6
Background and signal accuracy. (a) Comparison between estimated background signal (b j ) and measured spike-in probe signal (s j ) on the HG_U133A platform, for spike-in concentrations of 0. Results for other platforms are similar. (b) Estimated dinucleotide weight with respect to probe position on the HG U133A platform. (c, d) Calculated average expression levels for the spike-in probe sets at different spike-in concentrations, showing the bias in signal levels. The slope of the line represents the scale of the fold changes (for r2 and slope values see Tables S6 and S7 in Additional file 1).