= Base stacking
<Base stacking> is the close arrangement and interaction of neighbouring <nucleobases> with their approximately planar faces above one another. Along a <nucleic acid double helix>, neighbouring <base pairs> stack successively; <base pairing> instead associates partners across the two strands. Both affect duplex stability, and the interactions depend on the identities and arrangement of neighbouring <nucleobases>. See https://www.ncbi.nlm.nih.gov/books/NBK21134/[Brown, Genomes: base pairing and base stacking].
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