So chemical digestion is the process by which our proteolytic enzymes actually break down and cleave the chemical bonds that hold our macromolecules together. So basically, these proteolytic enzymes catalyze the reaction known as hydrolysis. It's a catabolic reaction that breaks down our chemical bonds using water. So the two types of proteolytic enzymes found in the mouth are amylase, also known as Tylen, as well as lipase, also known as lingual lipase. Now, amylase is a proteolytic enzyme that catalyzes the breakdown of carbohydrates, specifically of starch. It breaks down our carbohydrate, known as starch, into our maltose, as well as dextrin.