In the Tripeptide Glutathione (γ-Glutamyl-Cysteinyl-Glycine), the Side Chain Carboxyl Group

question 9

Multiple Choice

In the tripeptide glutathione (γ-glutamyl-cysteinyl-glycine) , the side chain carboxyl group of glutamate forms a peptide bond with the α-amino group of cysteine.The α-amino and α-carboxyl groups of glutamate do not participate in peptide bonds.Approximately what is the isoelectric point (pK) of glutathione?

• A)1.5.
• B)10.0.
• C)3.0.
• D)6.5.
• E)9.0.

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Definitions:

Mitochondrial Matrix

The innermost compartment of the mitochondria, filled with enzymes important for ATP production, mitochondrial DNA, and ribosomes.

Macronutrients

Nutrients required in large amounts by the body for energy, growth, and bodily functions, including proteins, fats, and carbohydrates.

Glycogenesis

The biochemical process of converting glucose into glycogen for storage in the liver and muscle cells.

Gluconeogenesis

A metabolic pathway that generates glucose from non-carbohydrate substrates like protein or fat, chiefly in the liver.