In some health food stores, it is possible to buy...

Name: Problem 87, Chapter 23: Introduction to General, Organic and Biochemistry
Uploaded: 2021-12-13T21:45:42-08:00
Duration: 37 s
Channel: Rabeya Zahid
Description: In some health food stores, it is possible to buy supplements that contain isolated enzymes. For example, the enzyme superoxide dismutase functions as an antioxidant in cells that are exposed to oxygen. Do you think that these supplements are likely to have significant value?

In some health food stores, it is possible to buy supplements that contain isolated enzymes. For example, the enzyme superoxide dismutase functions as an antioxidant in cells that are exposed to oxygen. Do you think that these supplements are likely to have significant value?

Key Concepts

Enzyme Structure and Function

Enzymes are biological catalysts that accelerate chemical reactions by lowering the activation energy required for the reaction to occur. Their functionality is highly dependent on their intact three?dimensional structure, which can be easily altered or denatured by changes in temperature, pH, or other environmental conditions.

Digestive Processes and Protein Degradation

When enzymes are ingested, they are exposed to the harsh conditions of the digestive system, including acidic pH in the stomach and proteolytic enzymes in the gastrointestinal tract. These conditions often lead to the degradation or denaturation of protein-based enzymes, compromising their structural integrity and functional activity.

Bioavailability in Nutritional Supplements

Bioavailability refers to the proportion of an ingested substance that enters the bloodstream and reaches its site of action in an active form. For enzyme supplements, the challenge lies in ensuring that they can survive the digestive process and be absorbed in a form that retains their catalytic functionality.

Antioxidant Mechanisms

Antioxidants are substances that help mitigate oxidative stress by neutralizing reactive oxygen species, which can damage cellular components. Antioxidant enzymes, such as those that dismutate free radicals, play crucial roles in protecting cells from oxidative damage. However, for such enzymes to have a significant value when taken as supplements, they must reach the relevant tissues in an active form.

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