Which of the following statements about glutathione is incorrect?

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It is composed of three amino acids.It transforms hemoglobin into methemoglobin.It aids in the detoxification of foreign compounds.It neutralizes free radicals and superoxide molecules.It plays a role in cellular antioxidant defense.

Explanation

Glutathione is a tripeptide known for its role in detoxifying xenobiotics and neutralizing reactive oxygen species. However, it does not convert hemoglobin into methemoglobin; this process is unrelated to glutathione's functions.