Amino Acids and Codon Numbers
Location: Outside U.S.
Date: Fall 2011
Why do some amino acids have so many codons?
Genetic code is degenerate code, meaning that some codons may have
similar functions or produce the same output. Hence some amino acids
will have more than one codon.
Good example: Leucine has codons CUU, CUC, CUA, CUG. You can almost
say that Leucine is CUx, where x is any ribonucleotide base.
All have the same function and produce the same output.
Hope that helps.
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Update: June 2012