Pepsin is the name given to a mix of several digestive enzymes secreted (as larger precursor proteins) by glands that line the stomach. These glands also secrete hydrochloric acid, which dissolves the particulate matter in food, allowing pepsin to enzymatically cleave individual protein molecules. The resulting mixture of food, HCl, and digestive enzymes is known as chyme and has a pH near 1.5. What pl would you predict for the pepsin proteins? What functional groups must be present to confer this pl on pepsin? Which amino acids in the proteins would contribute such groups?
Pepsin is the name given to a mix of several digestive enzymes secreted (as larger precursor proteins) by glands that line the stomach. These glands also secrete hydrochloric acid, which dissolves the particulate matter in food, allowing pepsin to enzymatically cleave individual protein molecules. The resulting mixture of food, HCl, and digestive enzymes is known as chyme and has a pH near 1.5. What pl would you predict for the pepsin proteins? What functional groups must be present to confer this pl on pepsin? Which amino acids in the proteins would contribute such groups?
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:4. Pepsin is the name given to a mix of several digestive enzymes secreted (as larger precursor
proteins) by glands that line the stomach. These glands also secrete hydrochloric acid,
which dissolves the particulate matter in food, allowing pepsin to enzymatically cleave
individual protein molecules. The resulting mixture of food, HCl, and digestive enzymes
is known as chyme and has a pH near 1.5. What pl would you predict for the pepsin
proteins? What functional groups must be present to confer this pl on pepsin? Which amino
acids in the proteins would contribute such groups?
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