Triple Helix Base Pairing
Watson and Crick base pairs are indicated by a "•" or a "-" or a "." (example: A•T, or poly(rC)•2poly(rC)).
Hoogsteen triple helix base pairs are indicated by a "*" or a ":" (example: C•G*G+, or T•A*T, or C•G*G, or T•A*A).
Read more about this topic: Nucleic Acid Nomenclature
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Saw the dance of nature forward far;
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Saw musical order, and pairing rhymes.”
—Ralph Waldo Emerson (1803–1882)