This method should be choosen to find sequence parts of cummulative low codon usage.
The triplet-fraction is represented as column according to the codon usage fraction of the table of the choosen organism.


Different colors can be choosen for highlighting codons below threshold 1, for highlighting codons below threshold 2 and for all other codons.
The html (above) output format shows only the codon position and the color. When choosing the pdf output format each codon gets represented in color according to choosen threshold, fraction, codon and amino-acid (one letter code).

Comparison of original Aequorea victoria GFP gene and codon adapted GFP gene for expression in Chlamydomonas reinhardtii.
original GFP gene from A. victoria
codon adapted GFP gene for expression in C. reinhardtii