NCIt definition : The paired nucleotides in a DNA or RNA sequence.;
Alternative definition : NCI-GLOSS: Two nitrogen-containing bases pair together between double-stranded DNA;
only specific combinations of these bases (e.g., adenine with thymine; guanine with
cytosine) are possible, a fact which facilitates accurate DNA replication; when quantified
(e.g., 8 base pairs, or bp), this term refers to the actual number of base pairs in
a sequence of nucleotides.;