H-DNA

Etymology
. From containing Hoogsteen-type bonding, in addition to Watson-Crick normal style bonding of base pairs.

Noun

 * 1)  A configuration of DNA, a triple-stranded DNA helix structure, right-hand twisting, where the third DNA strand fills in the major groove found in, bonding to the B-DNA with Hoogsteen-type bonding, forming Hoogsteen base pairs.
 * 2)  A DNA helix in such a configuration.