Country: United States
Date: April 2005
All the amino acids except methionine and trytophan are
represented by more than one codon. In case of these amino acids with
more than one codon is there any order of preference. lets say for the
amino acid lysine (K) which of the codon is more preferred either AAA or
This can only be answered by sequencing several different genes and
determining the relative frequency of the codons AAA and AAG. The next
question would be, do the relative frequencies of these two codons vary from
species to species. By examining the known sequences of different genes from
different species, you could answer this question.
Regards, Ron Baker, Ph.D.
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Update: June 2012