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Fig. 2.12
A view of the helix from upstairs
We know that DNA helix presents two groves: a major grove and a minor grove.
Figure 2.13 presents a stylized view of this structure, as a consequence of the double
rotation of the two paired lines around the same cylinder axis. This is the ideal
geometric structure underlying the fundamental discovery by Watson and Crick in
1953 [63].
Fig. 2.13
A stylized representation of DNA groves
In conclusion, anti-parallelism is a direct consequence of the bilinear nonpla-
nar arrangement of nucleotides, as deduced by the analysis developed in terms
of monomeric triangles. Moreover, the chirality of monomers joined to their anti-
parallelism implies that if they have the same chirality, then a reading agent can
read both the two concatenation lines along the same reading plane. Therefore,
DNA structure is implied by algorithmic arguments related to the fundamental
