Agarose is purified from agar and used exclusively for DNA gel electrophoresis due to its pore size properties
The claim is refuted because agarose is derived from agar and has numerous applications outside of DNA electrophoresis, such as protein separation, drug delivery, and molecular weight analysis of other biopolymers.
The claim contains two distinct factual errors: it asserts that agarose is used exclusively for DNA gel electrophoresis and that it is purified 'from agar' (agarose is actually a major component extracted alongside others, but more importantly, agarose has many non-electrophoretic uses like drug delivery and other types of biochemical separation such as serum protein electrophoresis or hyaluronic acid sizing). Multiple retrieved papers demonstrate uses of agarose outside of DNA gel electrophoresis (e.g., protein separation, drug delivery, hyaluronic acid analysis).
Pereira L, Valado A. Beyond Nutrition: The Therapeutic Promise of Seaweed-Derived Polysaccharides Against Bacterial and Viral Threats.. 2025. https://doi.org/10.3390/md23100407
Paper 0 notes that agar and agarose have broader commercial applications beyond electrophoresis, including antibacterial and antiviral uses.
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López-Cánovas AE, Victoria-Sanes M, Martínez-Hernández GB, López-Gómez A. Methods for Determining the High Molecular Weight of Hyaluronic Acid: A Review.. 2025. https://doi.org/10.3390/polym17243289
Paper 3 notes that agarose gel electrophoresis is also used to determine the molecular weight of hyaluronic acid.
Kocianová V, Voráčová I, Chung DS, Foret F. Gel Shrinkage in Discontinuous Electrophoresis: How to Stabilize the Electrolyte Boundary in EpitachophoresisPart 1Gel Selection.. 2025. https://doi.org/10.1021/acsomega.5c08736
Paper 5 discusses the use of agarose gels for large-volume DNA concentration via epitachophoresis rather than solely gel electrophoresis.
Mehmood A, Masood S, Khan TF, Asghar D, Mujeeb A. Bacterial ghosts embedded in natural hydrogels as drug delivery vehicles for cancer treatment.. 2026. https://doi.org/10.1039/d6ra00738d
Paper 9 highlights that agarose is utilized as a natural hydrogel for drug delivery systems in cancer treatment.
Sonagra AD, Zubair M, Dholariya SJ. Electrophoresis. 2026. https://europepmc.org/article/MED/36251838
Paper 11 states that agarose gel is used to separate serum proteins, hemoglobin, and PCR products in addition to nucleic acids.
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