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Biochemistry

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Antioxidants and Glutathione

BIOCHM-FRYEBA

Glutathione is an important antioxidant found naturally in all living organisms. Consider the structure of glutathione below.

Jjexpat. "Glutathione." Wikimedia Commons. N.p., 2 June 2016. Web. 7 Aug. 2016.

Identify ALL of the following statements which correctly describe glutathione.

Select ALL that apply.

A

Glutathione is a tripeptide.

B

Glutathione is a dipeptide.

C

Glutathione contains the amino acid cysteine.

D

Glutathione contains the amino acid glutamate.

E

Glutathione contains a normal peptide linkage as well as a gamma peptide linkage.

F

At a pH =7, the overall charge on glutathione would be -1, whereas at a pH = 12, the overall charge would be -2 (you may want to consult the chart below).

M. Rumpho-Kennedy. Created for Albert.io. Copyright 2016. All rights reserved.

G

Glutathione is a reducing agent, transferring its electrons to keep other molecules reduced, while forming the oxidation product cystine.