So if we take our genetic code, we see that the sequence CC, you or cytosine cytosine yourself, and the sequence Cytosine cytosine cytosine or CCC, these two different sequences, both correspond to the same exact amino acid. They correspond to our amino acid proline. Now, I haven't actually listed all the codons that are found in the genetic code, but if you want to, you can look up our genetic code online or in a textbook. So, once again, as we'll see in the next several lectures, during the process of translation, when we synthesize our proteins from mRNA molecules, we have to have a way to translate the language used by the mRNA to the language that is used by the proteins. And what the ribosomes do is they use this system known as the genetic code, in which we basically have three letter sequences that are known as codons that correspond to specific amino acids. And the genetic code is set to be redundant or degenerate, which basically means that two or more different codons can correspond to the same exact amino acid.