A simple method for estimating the intensity of purifying selection in protein-coding genes.

Abstract excerpt

We propose a method by which the intensity of purifying selection on a functional protein-coding gene is estimated by using three aligned homologous sequences: a processed pseudogene (psi), a functional paralog from the same species (g), and a functional ortholog from a different species (o). For each such trio, we calculate the numbers of nucleotide substitutions along the branches leading to psi and g, i.e., K...

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