Now, we have to multiply these out to basically find the total possibility, the total number of possibilities that we can have. And if we multiply these out, we get 20 to the 10th power, and that's about 1.0 24 times ten to 13 possibilities. So 10 trillion possibilities exist for an amino for a protein that consists of only ten amino acids. And usually proteins consist of hundreds and sometimes thousands of amino acids. And that means there is a great number of different types of sequences that are possible inside the proteins found inside our body. Now, what's so special about this sequence of amino acids?