The Symmetry of the Genetic Code and a Universal Trend of Amino Acid Gain and Loss

Details The Symmetry of the Genetic Code and a Universal Trend of Amino Acid Gain and Loss The Symmetry of the Genetic Code and a Universal Trend of Amino Acid Gain and Loss

2007-07-05

arxiv.org/abs/0707.0754v1

Biology

Quantitative Biology

Populations and Evolution

7 pages, 3 tables

Scientific paper

Part 1 of the study intends to show that the universal trend of amino acid gain and loss discovered by Jordan et al. (2005) can be accounted for by the spontaneity of DNA typical damages. These damages lead to replacements of guanine and cytosine by thymine. Part 2 proposes a hypothesis of the evolution of the genetic code, the leading mechanism of which is the nucleotide spontaneous damage. The hypothesis accounts for the universal trend of amino acid gain and loss, stability of the genetic code towards point mutations, the presence of code dialects, and the symmetry of the genetic code table.

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