Figure 3
From: Increased incidence of rare codon clusters at 5' and 3' gene termini: implications for function
The number of E. coli genes containing a rare codon cluster for a given sequence range or condition. The number of genes of the 2622 greater than 250 windows with a rare codon cluster in the terminal window, within 25 windows of the terminus and within 50 windows of the terminus are shown from the 5' end (top axis) or 3' end (bottom axis). As controls, two non-terminal ranges are also shown for the 50 window frame. The distribution for genes with versus without signal sequences and predicted versus not predicted to be secreted are also shown.