Fig. 11From: Selective forces and mutational biases drive stop codon usage in the human genome: a comparison with sense codon usageChange of base relative frequencies at +1 position in gene categories with increasing breadth of transcription. Transcriptome data were obtained from the Gene Expression Barcode (Barcode) database. Genes were clustered into four categories by proportion of cell types in which a gene was estimated as expressed (Pr)Back to article page