The key feature of this short peptide is its high concentration of one specific amino acid, proline, that provides an unusual kink in peptides and proteins and may delay or even prevent its degradation
Mol Interv 7:31324 Mieyal JJ, Gallogly MM, Qanungo S, Sabens EA, Shelton MD (2008) Molecular mechanisms and clinical implications of reversible protein S -glutathionylation
Structure of the blood-brain barrier and its role in the transport of amino acids
[6] Stress, unavoidable toxins in the environment, and illness greatly reduce our glutathione levels
Cysteine residues were searched with a static modification for carboxyamidomethylation (+57.02146 Da), and N-termini and lysine residues were searched with a static modification corresponding to the TMT tag (+229.1629 Da)