And once these zymogens are inside the intestine, they only begin to cleave those proteins when the Xiaomogens are activated into their fully functional form. So the question is, how exactly is Chimotryptynogen actually activated proteolytically? Well, as it turns out, interestingly enough, it's actually another active digestive enzyme known as trypsin, another protease that is responsible for activating Chimotrypcinogen into its active form, Chimotrypsin. So let's take a look at how that actually takes place by looking at the following diagram. So, in part A, we basically have that inactive Zymogen, the Chimotrypcinogen. And notice it consists of 145 individual amino acids.