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. Now, the question is, why do we have different types of C and proteases inside our body? And the question is, what exactly differentiates Trypsin elastics and Chimera Trypsin if they have the same exact catalytic triad? Well, remember, it's the catalytic triad that gives the enzyme its catalytic power, that gives the protease the ability to cleave those peptide bonds.