An Enzyme Secreted by the Stomach Wall

This page is the CodyCross answer for the clue below from Casino, Group 263, Puzzle 4 (Chips and Tokens).

Question is: An Enzyme Secreted by the Stomach Wall

and the answer is: PEPSIN

Word Meaning:

PEPSIN — (biochemistry) A digestive enzyme that chemically digests, or breaks down, proteins into shorter chains of amino acids.

Definitions from Wiktionary.