Hydrogen bond base pairing forces are essential for the mechanisms associated with DNA stability. Despite attracting great research attention, this fundamental interaction has eluded a precise physical description so far since its electrical origin has not been quantified yet. Researchers now have proposed characterization by means of electrical forces, providing a framework for universal characterization of hydrogen bonds. In this way, they provide technical arguments to support that hydrogen bonds are well distinguishable and their role in biological events require a proper specific intrabond description.

Via:: https://www.nanowerk.com/spotlight/spotid=48271.php

Hydrogen bond strength in DNA: where 3 could be less than 2

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