Which of the following is a nitrogen-containing,nonprotein compound that performs an important function in the body?

Question

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Glutathione is a tripeptide composed of cysteine, glycine, and glutamic acid. It plays an important role in protecting cells from oxidative stress and is involved in the detoxification of harmful compounds in the liver. It contains nitrogen but is not a protein. Methionine is an essential amino acid that contains sulfur, not nitrogen. Pepsin is an enzyme that helps digest protein, while actin is a protein that is involved in cell movement and muscle contraction.

Which of the Following Is a Nitrogen-Containing,nonprotein Compound That Performs