Journal of Molecular Evolution

, Volume 5, Issue 4, pp 327–332 | Cite as

Symmetries of genetic code-doublets

  • H. -J. Danckwerts
  • D. Neubert
Letter to the Editor


The fact that 64 base triplets code only about 20 essential amino acids implies a strong degeneracy of certain base doublets. It is shown that the set of degenerate base doublets and the set of non degenerate base doublets are highly structured. A mathematical formalism is introduced which allows a systematic description of the consequences of an exchange of bases in a doublet. By this formalism it is shown that the two mentioned sets have in fact the same structure.

Key words

Genetic Code Degeneracy of ~ Symmetry of ~- Base Triplets - Base Doublets Group Property of ~ Transformation of ~ 


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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • H. -J. Danckwerts
    • 1
  • D. Neubert
    • 2
  1. 1.Fachbereich Chemieder Universität RegensburgGermany
  2. 2.Physikalisch-Technische BundesanstaltInstitut BerlinBerlin 10Germany

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