Pepsin A

Pepsin A (EC3.4.23.1, pepsin, lactated pepsin, pepsin fortior, fundus-pepsin, elixir lactate of pepsin, P I, lactated pepsin elixir, P II, pepsin R, pepsin D) is an enzyme. This enzyme catalyses the following chemical reaction

The enzyme is a predominant endopeptidase in the gastric juice of vertebrates.