Phylogenetic analysis of mutational robustness based on codon usage supports that the standard genetic code does not prefer extreme environments.

Abstract excerpt

The mutational robustness of the genetic code is rarely discussed in the context of biological diversity, such as codon usage and related factors, often considered as independent of the actual organism's proteome. Here we put the living beings back to picture and use distortion as a metric of mutational robustness. Distortion estimates the expected severities of non-synonymous mutations measuring it by amino acid...

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