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This may especially concern redox-sensitive Cys residues in proteins and peptides, which have low pKa values (36) and are known as acidic thiols

The human tri-peptide GHK-Cu in prevention of oxidative injury and tissue remodeling.

Chemoproteomic identification of a DPP4 homolog in Bacteroides thetaiotaomicron

Key role of alkanoic acids on the spectral properties, activity, and active-site stability of iron-containing nitrile hydratase from Brevibacterium R312

doi: 10.3390/ijms19123794 181 AkasakiYAlvarez-GarciaOSaitoMCaramsBIwamotoYLotzMK

Glucagon-Like Peptide-1 Receptor is Involved in Learning and Neuroprotection