But of course, in our body, in our digestive system, for example, we have many other examples of seren proteases. The question is, what is the mechanism that these other seren proteases actually use to cleave peptide bonds? Well, it turns out other crises also use this same catalytic triad. And what that means is they also carry out the catalysis process by using the same exact mechanism, namely covalent catalysis and acid based catalysis and two examples of other cum proteases inside our digestive system that also contain the same catalytic triad is Trypsin as well as elastase. So Chimotrypsin is not the only serum protease that utilizes this catalytic triad. In fact, Trypsin and Elastase are two other serum proteases found in our digestive system that use this same exact catalytic triad and therefore the same exact mechanism of catalysis that we spoke about in the previous lecture.