Adding salt during DNA precipitation neutralizes nucleic acid backbone charges.

the verdict

SUPPORTED

the evidence backs this

Recorded sources

3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Adding salt during DNA precipitation provides positive counterions that neutralize or screen the negative charges of the nucleic acid backbone, reducing electrostatic repulsion and allowing the molecules to aggregate.

The analysis

The retrieved papers consistently support the role of salts in providing counterions that interact with, screen, or neutralize the negative charges on the nucleic acid backbone during precipitation and electrostatic characterization.

Evidence for · 3

Using capillary electrophoresis to characterize the hydrodynamic and electrostatic properties of DNA in solutions containing various monovalent cations

Recorded source metadata

Nancy C. Stellwagen. Using capillary electrophoresis to characterize the hydrodynamic and electrostatic properties of DNA in solutions containing various monovalent cations. 2021. https://doi.org/10.1002/elps.202100176

Paper [0] describes how monovalent cations interact electrostatically with the negatively charged nucleic acid backbone to alter DNA properties.

Source citation format

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More for · 2

Study of the polyribosyl-ribitol-phosphate precipitation mechanism by salts and organic solvents.

Recorded source metadata

Rodrigo Simas, M. Takagi, E. A. Miranda. Study of the polyribosyl-ribitol-phosphate precipitation mechanism by salts and organic solvents.. 2019. https://doi.org/10.1016/j.ijbiomac.2019.08.110

Paper [1] notes that charged biopolymers like DNA precipitate when a significant fraction of their backbone charges are neutralized by counterions.

Source citation format

The Impact of Ion Mixing Entropy on Orientational Preferences of DNA Helices: FRET Measurements and Computer Simulations

Recorded source metadata

C. Templeton, Ian Hamilton, Rick Russell, R. Elber. The Impact of Ion Mixing Entropy on Orientational Preferences of DNA Helices: FRET Measurements and Computer Simulations. 2023. https://doi.org/10.1021/acs.jpcb.3c04354

Paper [3] explains how mobile cations provide charge screening and neutralization to overcome electrostatic repulsion between DNA backbone charges.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8001 Aug 2026

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