Correlation of RNA expression levels between RNA-Seq and tiling array platforms. Each point represents a gene from the composite model. RNA-Seq expression levels per gene were measured using RPKM, and tiling array levels were measured using the mean intensity of probes falling within composite exons. The Spearman's coefficient is 0.90, indicating that the platforms correlate well on identical samples. The disproportionate number of genes in the upper left likely represents cross-hybridization.