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The glutamate residue is linked through its side-chain carboxyl, giving a gamma-glutamyl bond rather than a standard alpha-peptide bond, which is why the molecule resists most intracellular peptidases and is cleaved chiefly by gamma-glutamyl transpeptidase at the cell surface
Antioxidants are substances that reduce oxidative stress by combating free radicals in the body
Zou X, Liang X, Dai W, Zhu T, Wang C, Zhou Y, et al
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