Codon usage and even the genetic code itself varies from one organism to the next.

Question

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Codon usage and the genetic code can vary among different organisms, resulting in different amino acid sequences for the same protein. For example, the genetic code used by mitochondria is slightly different from that used by the nucleus in eukaryotic cells. Additionally, some bacteria use a slightly different genetic code than most organisms.

Codon Usage and Even the Genetic Code Itself Varies from One