Supporting information for Qian et al. (2002) Proc. Natl. Acad. Sci. USA, 10.1073/pnas.222491799
Fig. 6.
This graph shows the distribution of the ratios of the intensity measurements for all six possible comparisons from the four repetitions of expression profiling analysis of the KG-1 myeloid leukemia cell line. The genes/ESTs with intensity readings below 150 in all four experiments were filtered out, because low-intensity readings are less accurate. All of the comparison values among the four experiments are included and were calculated by Affymetrix software. The y-axis indicates the total number of intensity comparisons. Therefore, each gene or EST is represented on the y-axis six times, because six separate comparisons were made among the four experiments. The x-axis represents the log ratio of the intensity measurements between two samples. Importantly, the log ratio of the intensity measurements in 97.5% of the observations falls within +/–1.0, indicating excellent reproducibility.