Defining the edges of substitutional heterogeneity

Guy Reeves reevesg at
Tue Apr 10 17:04:31 EST 2001


I am trying to ask the question, do the edges of regions which show statistically different rates of synonymous substitution coincide with genetic feature such as exon or gene boundaries?

Ideally I would like a method that could find regions in a sequence with the most statistically different rates of synonymous substitution and then define as closely as possible their probable edges.

If possible I would like the method to be able to do this  without a priori defining regions or window sizes (other than to specify a requirement for the regions to be greater than a particular value).  

The method need not necessarily allow for phylogenetic structure as the 5kb protein fragments I am analyzing all radiate from a polytomy 

Ideal or not I would be very interested in any approach along these lines

Thanks for any help 


Guy Reeves 
Smithsonian Tropical Research Institute
Naos Molecular Biology and Evolution Laboratory
Republic of Panama
reevesg at
telephone : 00507 212 8831 (direct)
Fax : 00507 212 8790


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