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In these two cases, what conclusions can we make in particular about the evolution of the protein itself? It's not clear to me that it is right to make any evolutionary conclusions based on function alone. DNA sequence would be a FAR better way to estimate evolutionary relatedness.


A few details One of these species, species A, is close to the common ancestor of A and B, in terms of evolutionary distance, while B is farther although for both cases, it took two speciation events to end up with species A and species B. I have two issues here. I don't understand why this information matter for your question. There are several ...

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