Pepsinogen is the proenzyme of pepsin. Pepsinogen is inactive, it is metabolized into the enzyme pepsin which break down proteins into small molecules.
The substrate is proteins, and the products are peptides. Pepsin is a protease, i.e. an enzyme that catalyzes the breakdown of proteins. In humans, it is secreted by certain cells (called chief...
pepsin (which breaks down protein) is produced in the stomach unlike the enzymes amylase (which breaks down carbohydrates) and lipase (which breaks down lipids or fats) which are produced in the...