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Watson-Crick bonds guanine-cytosine and adenine-thymine helically shape DNA. If I understand correctly, a sequence in only two of the nucleotides, for instance TGGTGTGGGTG ... would determine the dual side (ACCACACCCAC...), because the only possible bonds are TA, and GC.

I am interested in knowing if there exist double bonds in useful biomolecules. Precisely, I'd be interested in knowing if there exist a useful double bond present in chains of (something like) nucleotides.

Thank you in advance.

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closed as unclear what you're asking by David, Bryan Krause Apr 16 at 16:18

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ A double bond is a type of covalent chemical bond: en.wikipedia.org/wiki/Double_bond $\endgroup$ – J-- Oct 17 '18 at 15:02
  • $\begingroup$ If you are asking if helical structures exist outside of DNA, collagen (a protein) exists as a triple helix see here $\endgroup$ – user1136 Apr 15 at 17:32
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    $\begingroup$ I have voted to close this as unclear because the poster never responded to requests for clarification. $\endgroup$ – David Apr 16 at 12:57
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Hydrogen bonding gives rise to the tertiary structure of a biopolymer. You can learn more about the many shapes and structures of nucleic acids here: https://en.wikipedia.org/wiki/Nucleic_acid_tertiary_structure

Proteins are the most structurally diverse biopolymers, and they assume very complex and dynamic shapes: https://en.wikipedia.org/wiki/Protein_structure

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