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Practice Problem 24.8
Glutathione is a tripeptide found in most living cells. Partial acid-catalyzed hydrolysis of glutathione yields two dipeptides, CG and one composed of E and C. When this second dipeptide was treated with DNFB, acid hydrolysis gave N-labeled glutamic acid.
(a) On the basis of this information alone, what structures are possible for glutathione?
(b) Synthetic experiments have shown that the second dipeptide has the following structure:
What is the structure of glutathione?
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