CBU - Computational Biology Unit

Online tools The ratio of nonsynonymous (Ka) to synonymous (Ks) nucleotide substitution rates is an indicator of selective pressures on genes, and can be used to identify pairwise combinations of genes or branches of gene phylogenetic trees, where encoded proteins may have changed function.

  • Warning: the service is not further developed, and provided as-is to the community

  • Please note that results are not ensured if the task runs for more than 2 hours

Scientific questions: David Liberles' group

Technical comments: services -at- cbu.uib.no

Ka/Ks Calculation tool

Sequences to be analyzed




Ka/Ks parameters

Codon bias


Determine Ignore Choose percentage
Windowing options Top node Choose node
This page is maintained by webmaster@bccs.uib.no. Last updated: Tuesday 12 February, 2008
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