Although the B-DNA form is most common under the conditions found in cells, it is not a well-defined conformation but a family of related DNA conformations that occur at the high hydration levels present in cells.
Selvom "B-DNA-formen" er den mest almindelige under de forhold, der findes i celler, er den ikke en veldefineret konformer, men en familie af relaterede DNA-konformere, der finder sted på de høje hydratiseringsniveauer i levende celler.