Medical Definition of A-form DNA
1.
One of several forms that can be assumed by a double helix. A-DNA is stable in dehydrated conditions.
This form is less common than the dominant form found under physiological conditions -- beta-DNA. This form is also assumed by DNA-RNA hybrid helices and by regions of double-stranded RNA. It is a right-handed helix and is a more compact form than beta-DNA.
(09 Oct 1997)
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Lexicographical Neighbors of A-form DNA
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