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Table 3 Summary of probe- and gene-level variances for technical replicates

From: A comparison of Affymetrix gene expression arrays

  U133 HuEx HuGene
Average Number of Probes per Gene 16.1 44.8 26.8
Average Number of Probes per Exon - 5.8 3.7
Median Probe-Level Variance 0.139 0.306 0.308
Median Exon-Level Variance - 0.086 0.119
Median Gene-Level Variance 0.015 0.035 0.020