___I stumbled on this geometric view of DNA RNA structure; the main idea revolves on mappings on a sphere's surface.
http://www.codefun.com/
http://www.codefun.com/Geometry.htm
___I don't know enough chemistry to say it's relevant or not, but it has the bright twinkling light of geometry that draws me in every time.

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semantics is not always just pedantic quibbling. ~ douglas r. hofstadter