Overlap of probe detectability and probe variability across the three data sets. (A) Probes detected in each of the data. A set of 9565 genes were above the detection threshold in all three data sets; 14558 genes were not detected in any of the data sets. (B) Probes with high variability. A number of 5600 genes were in the top 75% in terms of coefficient of variation CV in all three data sets, and these genes were selected for network construction; 1023 were in the bottom 25% in terms of variability in all data sets.