Genome Landscapes and Bacteriophage Codon Usage
The table of 61 codons along with their associated w-values is shown for E. coli. The w-value of each codon reflects its frequency in highly transcribed E. coli genes (see main text). The Table 1 is divided into four regions: codons with high CAI (w≥0.9) ending in G or C (dark red); codons with high CAI ending in A or T (dark blue); codons with low CAI (w<0.9) ending in G or C (light red); codons with low CAI ending in A or T (light blue). As the table shows, there is a slight bias for GC3 in the high-CAI codons (58%), and slight bias away from GC3 in the low-CAI codons (48%).