Figure 9From: A simple metric of promoter architecture robustly predicts expression breadth of human genes suggesting that most transcription factors are positive regulatorsThe correlation between BoE and TfbsNo. is recapitulated over evolution. This figure consists of four panels identified as a through d. Panel a shows a boxplot for BoE depending on age of gene duplication. Panel b shows a similar boxplot of TfbsNo. Young genes are more tissue-specific and have fewer TF binders. The correlation between TfbsNo. and BoE was strongest for young genes (Spearman rho = 0.531, 0.513, 0.46, 0.447, and 0.403 for increasingly older taxon groups, from primate through to eukaryotic genes). To explain the origins of additional tissue-specific genes in younger taxa, we divided duplication events into three subclasses: “housekeeping conserved”, “tissue − sp. conserved”, and “transformative”. Panels c and d show barplots for the three different mechanistic subtypes of gene duplication events (absolute numbers and relative proportions thereof, respectively).Back to article page