Server migration. PDF generation ported from pdflib to fpdf.
Output option pdf will no longer be supported in old versions.

Implementation of relative adaptiveness. Read more ...
Old versions can be found using the following links:
      • each triplet position vs. usage table
      • each codon vs. usage table
      • compare two usage tables

Done! Suggestions are welcome! Feel free to contact me!

stable but ...

idea born in 2001