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Table 6 Comparison of the signal of first and second probe. Comparison of the probe 1 versus probe 2, nt and tr stand for "non-treated" and "treated," respectively and CV is the coefficient of variation. The ratio pr1/pr1&2 is the fold difference obtained using probe 1 only versus the fold difference obtained from the probe set; similarly for pr2/pr1&2. The last two columns give the absolute values of the difference of coefficient of variation. The minimum and maximum values in the last two rows were calculated excluding the gene GI_4755127, which shows abnormal behavior (printed in italics). Fourteen genes listed were obtained using the interval 0.8; 11 genes printed in bold are the genes, obtained for the interval 0.9*) Excluding the probe set GI_4755127.

From: Variation in fiberoptic bead-based oligonucleotide microarrays: dispersion characteristics among hybridization and biological replicate samples

Probe Set Gene Name Avg(Tr)/Avg(Nt) Ratio (probe1/probe1&2) Ratio (probe2/probe1&2) Probe 1 |CV(nt)-CV(tr)| Probe 2 |CV(nt)-CV(tr)|
GI_4504436 HMOX1 5.61 0.99 1.08 0.02 0.01
GI_4505414 NQO1 4.12 1.05 0.97 0.03 0.12
GI_4755127 GADD45 2.78 0.67 1.11 0.43 0.40
GI_9790904 DDB2 1.84 0.97 1.05 0.03 0.23
GI_4557514 TFRC 1.62 0.97 1.01 0.19 0.20
GI_4507456 P21 1.58 1.05 0.96 0.03 0.02
GI_17978494 MGST1 1.52 1.04 0.98 0.01 0.02
GI_22035635 XPC 1.41 1.00 1.01 0.03 0.11
GI_20127459 CLK3 1.34 1.03 0.92 0.11 0.07
GI_4502884 TCP1 1.30 0.99 1.06 0.14 0.01
GI_5174726 ATF3 1.27 1.05 1.00 0.08 0.13
GI_4506844 G1P2 0.69 1.07 0.95 0.03 0.04
GI_22538813 CCL5 0.67 1.01 0.96 0.04 0.06
GI_4826773 CCL4 0.62 1.05 0.88 0.04 0.04
min *   --- 0.97 0.88 0.01 0.01
max *   --- 1.07 1.08 0.19 0.23