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I know what major (2.2 nm) and minor (1.2 nm) groves are, but what is then name for:

  • a 360-degree rotation of DNA (3.4 nm)

  • the gap between each base pair (0.34 nm)?

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The term for distance covered in a 360° rotation of helix is known as the pitch of DNA helix, though there is no special name for distance covered between 2 base pairs. It can be called as rise per base pair of DNA. See the table below from this article:

table

Reference: Nucleic Acid Double Helix

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  • $\begingroup$ 458 views :) wow ! $\endgroup$ – Alex P Jan 5 '17 at 0:52
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It turns out that the gap between (heterocyclic nitrogenous) base pairs is called 'adjacent base pair width'. Also, the pitch (10 base pairs long) is also known as 'one helical turn'. Just a bit of additional information...

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  • $\begingroup$ it is (kind of) mandatory here to give some references to your answer (even if its on your own question) so that other readers can have a source for more information. $\endgroup$ – another 'Homo sapien' Jan 8 '17 at 17:54

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