Source:http://linkedlifedata.com/resource/umls/id/C0600436
MSH: Pairing of purine and pyrimidine bases by HYDROGEN BONDING in double-stranded DNA or RNA.,GO: Interacting selectively and non-covalently with nucleic acid via hydrogen bonds between the bases of a gene product molecule and the bases of a target nucleic acid molecule. [GOC:krc],NCI: 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.