Tag for questions related to the set of three-letter combinations of nucleotides called codons, each of which corresponds to a specific amino acid or stop signal.

learn more… | top users | synonyms

9
votes
1answer
108 views

Evolution of the Redundancy of the Genetic Code

In short Looking at the genetic code, it appears that most redundancy is on the third letter rather than on the first or the second letter of the codon. Why has it evolved this way? Longer version ...
1
vote
1answer
210 views

Do alternative start codons code for methionine after transcription?

There is some literature which shows that all start codons code for methionine. However, in the standard genetic code, the alternative start codons clearly code for leucine. Does that mean these ...
2
votes
1answer
4k views

Why do three nucleotides code for one amino acid? Why not 5 nucleotides? [duplicate]

We all know why there are 3-base codons, and why there aren't any 2-base codons. But why is there not a 4-base a 5-base codon?