Figure 1From: Identification and validation of suitable endogenous reference genes for gene expression studies in human peripheral blood The Average log 2 - intensity (x-axis) of 39,500 genes from a total of 526 Affymetrix Human 2.0 Plus microarrays is plotted against the standard deviation of the log 2 - intensity (y-axis) of those genes. Probe-sets highlighted in red are the 100 probe-sets with the lowest standard deviation within an interval of the log2-transformed intensity values between 5 and 10.Back to article page