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Updated: Apr 13, 2026

Isolation of Fidelity Variants of RNA Viruses and Characterization of Virus Mutation Frequency

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Published on: June 16, 2011

Consideration of a Liquid Mutation-Accumulation Experiment to Measure Mutation Rates by Successive Serial Dilution.

Stephan Baehr^1,2, Wei-Chin Ho^1,3, Samuel Perez^1,2

¹Center for Mechanisms of Evolution, Biodesign Institute, Arizona State University, Tempe, AZ, USA.

Genome Biology and Evolution

|March 15, 2025

Summary

A novel liquid-phase mutation-accumulation (MA) experiment offers a more accurate and automatable approach to studying DNA mutation rates and spectra in evolutionary biology. This method streamlines research, reducing labor and potentially improving environmental relevance.

Keywords:

DNA mutation MMR-E. coli evolution liquid vs. plate growth mutation accumulation

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Published on: November 28, 2019

Area of Science:

Evolutionary Biology
Molecular Biology
Genetics

Background:

Mutation-accumulation (MA) experiments are crucial for measuring DNA mutation rates and spectra.
Traditional MA experiments are laborious, time-consuming, and often use artificial environments (e.g., agar plates).
Existing methods require significant human capital for execution.

Purpose of the Study:

To propose and validate a fully liquid-phase mutation-accumulation (MA) experiment.
To investigate if a liquid-phase MA experiment can more accurately reflect organismal environments.
To explore the potential for automation in MA experiments.

Main Methods:

Development and execution of a liquid-phase MA experiment using serial dilutions.
Comparison of mutation rates in liquid culture versus plate culture for MMR-E. coli.
Analysis of mutation spectra to identify mutation patterns.

Main Results:

The liquid-phase MA experiment successfully recapitulated the mutation rate of MMR-E. coli.
A modified mutation spectrum was observed, with a transition skew indicating a preference for A:T→G:C over G:C→A:T mutations.
The results highlight the potential role of tautomerization in DNA mutation mechanisms.

Conclusions:

A liquid-phase MA experiment is a viable and potentially more environmentally relevant alternative to traditional methods.
This approach offers significant advantages in terms of automation and reduced labor requirements.
The observed mutation spectrum provides insights into the molecular mechanisms driving genetic mutations.