Structure
This domain assumes a beta(2)-alpha-beta-alpha-beta(2) fold, with a left-handed crossover between strands beta2 and beta3. It has a four criss-crossed beta-strands surrounded by four alpha-helices that are arranged in a Rossmann fold
Read more about this topic: Type I Topoisomerase
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“For the structure that we raise,
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“Just as a new scientific discovery manifests something that was already latent in the order of nature, and at the same time is logically related to the total structure of the existing science, so the new poem manifests something that was already latent in the order of words.”
—Northrop Frye (b. 1912)