Normalized average difference (Avg Diff) of one pair of replicate arrays for each experimental condition in a log10 scale. (a) heat-shocked Otx2; (b) heat-shocked otd; (c) heat-shocked wild type; (d) wild type. Only probe sets with positive values in both arrays are used. The central line is y = x, and the flanking lines indicate the difference of a factor of two.
Montalta-He et al. Genome Biology 2002 3:research0015.1 doi:10.1186/gb-2002-3-4-research0015