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Electrical forces are the background of all the interactions occurring inbiochemical systems. From here and by using a combination of ab-initio andad-hoc models, we introduce the first description of electric field profileswith intrabond resolution to support a characterization of single bond forcesattending to its electrical origin. This fundamental issue has eluded aphysical description so far. Our method is applied to describe hydrogen bonds(HB) in DNA base pairs. Numerical results reveal that base pairs in DNA couldbe equivalent considering HB strength contributions, which challenges previousinterpretations of thermodynamic properties of DNA based on the assumption thatAdenine/Thymine pairs are weaker than Guanine/Cytosine pairs due to the soledifference in the number of HB. Thus, our methodology provides solidfoundations to support the development of extended models intended to go deeperinto the molecular mechanisms of DNA functioning.

Unveiled electric profiles within hydrogen bonds suggest DNA base pairs with similar bond strengths