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Updated: Apr 15, 2026

A Protocol for Functional Assessment of Whole-Protein Saturation Mutagenesis Libraries Utilizing High-Throughput Sequencing
Published on: July 3, 2016
How to calculate the non-synonymous to synonymous rate ratio of protein-coding genes under the Fisher-Wright
1Department of Genetics, Evolution and Environment, University College London, Gower Street, London WC1E 6BT, UK mario.barros@ucl.ac.uk.
Abstract:
First principles of population genetics are used to obtain formulae relating the non-synonymous to synonymous substitution rate ratio to the selection coefficients acting at codon sites in protein-coding genes. Two theoretical cases are discussed and two examples from real data (a chloroplast gene and a virus polymerase) are given. The formulae give much insight into the dynamics of non-synonymous substitutions and may inform the development of methods to detect adaptive evolution.
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