Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Base Pair

  • Juli Peretó
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_154-2

Definition

Base pair is a pair of nucleic acid bases each in a different nucleotide monomer in the same (intramolecular) or different (intermolecular) nucleic acid strands and linked to one another by specific hydrogen bonds. The canonical base pairs in DNA (Watson-Crick pairs) contain one purine and one pyrimidine in antiparallel positions: adenine binds thymine in DNA – uracil in RNA (through two hydrogen bonds) – and guanine binds cytosine (through three hydrogen bonds). There are also many examples of non-Watson-Crick pairing, especially in three-dimensional structures of RNAs.

See Also

Keywords

Hydrogen Bond Nucleic Acid Base Pair Bioorganic Chemistry Genetic Code 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Institut Cavanilles de Biodiversitat i Biologia EvolutivaUniversitat de ValènciaValènciaSpain