Probe intensity distribution: Histogram for intensity distribution on A) raw and B) log2 normalized data is shown (A bell-shaped curve is overlaid for comparison purposes). Box-and-whisker plot of each experimental condition are shown at the bottom of each histogram. Samples are in the following order: 1) NCI-H1650 pLKO control (Replicate 1), 2) NCI-H1650 Mark2 Knockdown (Replicate 1), 3) NCI-H1693 pLKO control (Replicate 1), 4) NCI-H1693 Mark2 Knockdown (Replicate 1), 5) NCI-H1993 pLKO control (Replicate 1), 6) NCI-H1993 Mark2 Knockdown (Replicate 1), 7) NCI-H1650 Mark2 Knockdown (Replicate 2), 8) NCI-H1650 pLKO control (Replicate 2), 9) NCI-H1693 pLKO control (Replicate 2), 10) NCI-H1693 Mark2 Knockdown (Replicate 2), 11) NCI-H1993 pLKO control (Replicate 2), 12) NCI-H1993 Mark2 Knockdown (Replicate 2).