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Application of DNA Fingerprinting using the D1S80 Locus in Lab Classes
Published on: July 17, 2021
Marginal nature of DNA solutions
Eyal Shafran1, Alon Yaniv, Oleg Krichevsky
1Physics Department, Ben-Gurion University, Beer-Sheva 84105, Israel.
Abstract:
We adapt a scanning fluorescence correlation spectroscopy technique to measure the structure factor of complex fluid systems and present the first measurements of the structure of semidilute solutions of long DNA polymers. The measured structure factors exhibit screening effects which, as expected for semidilute polymer solutions, grow stronger with increasing DNA concentration c. The measured concentration dependence of the screening length xi proportional to c{0.53+/-0.02} is unusual, but can be understood within the framework of a marginal solutions theory for semiflexible polymers.
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