Encyclopedia of Astrobiology

2015 Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James (Jim) CleavesII, Daniele L. Pinti, José Cernicharo Quintanilla, Daniel Rouan, Tilman Spohn, Stéphane Tirard, Michel Viso

Quencher

  • Henderson James (Jim) CleavesIIEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-662-44185-5_1327

Definition

In chemistry, a quencher is a substance that absorbs excitation energy from a  fluorophore. Most quenchers reemit much of this energy as visible light; dark quenchers dissipate the energy as heat, as they have no native fluorescence. Dark quenchers are used in molecular biology in conjunction with fluorophores, for example, in molecular beacons.

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Earth–Life Science Institute (ELSI)Tokyo Institute of TechnologyMeguro–kuJapan
  2. 2.Institute for Advanced StudyPrincetonUSA
  3. 3.Blue Marble Space Institute of ScienceWashingtonUSA
  4. 4.Center for Chemical EvolutionGeorgia Institute of TechnologyAtlantaUSA