Extended Data Fig. 1: Promoter strength and in vivo expression levels of corresponding genes are not correlated.
From: Synthetic promoter designs enabled by a comprehensive analysis of plant core promoters

a, Correlation (Pearson’s r) between the promoter strength and expression levels of the corresponding genes in the indicated species. Each boxplot (centre line, median; box limits, upper and lower quartiles; whiskers, 1.5 × interquartile range; points, outliers) represents the correlation for all individual tissue samples in the RNA-seq dataset (see Methods). The number of samples in the RNA-seq dataset is indicated at the bottom of the plot. b,c, Examples of the correlation between gene expression (Arabidopsis adult cotyledon (b) or maize root cortex (c) samples) and promoter strength as determined in tobacco leaves (b) or maize protoplasts (c). These examples correspond to the highest correlations in (a).