And together this catalytic triad, as we'll see in just a moment, actually promotes the cleavage of the peptide bond. So let's actually discuss what the reaction mechanism is. So what are the details of the reaction mechanism that takes place inside the active side of climate? Trypsin. So let's begin in the following stage. So we have the Aspartate 102 that positions this Histosine 57 so that these electrons can interact with the H atom.