Biomedical Engineering Reference
In-Depth Information
Fig. 5.3
The purine nucleobases adenine and guanine (top left and right), the nucleosides
deoxyadenosine and deoxyguanosine (middle left and right), and the nucleotide deoxyadenosine-
5
0
-monophosphate. The molecules are not drawn to the same relative scale
diffuse dipole-bound states required for the vibrational Feshbach resonance model
may not exist in the condensed phase, and they argue that the principal strand-break
mechanism is more likely to involve the nucleobase
resonances.
5.3.1.2
The Purines
The purine bases, adenine and guanine (Fig.
5.3
), contain fused 5- and 6-membered
rings, rather than the single 6-membered ring of the pyrimidines. This increase in
