A peptide carrying a mercaptomethylated proline derivative at the C-terminus was prepared by solid-phase peptide synthesis (SPPS) and converted to the thioester of 3-mercaptopropionic acid (MPA) by aqueous MPA under microwave irradiation conditions. This post-SPPS thioesterification reaction was successfully applied to the synthesis of a glycopeptide thioester composed of 25 amino acid (AA) residues, which was then used for the preparation of a 61-AA glycopeptide by the thioester condensation method.
Durch Festphasen‐Peptidsynthese lassen sich in oxidierter Form Selenoglutathion (GSeH) und andere Selenocystein‐haltige Peptide mit einer Aminosäuresequenz des aktiven Zentrums von Glutathion‐Peroxidase (GPx) erhalten. Ihre GPx‐Aktivität gegen Wasserstoffperoxid (siehe Schema) zeigt, dass GSeH zusätzlich zur biologischen Funktion eines Glutathion‐Analogons eine effiziente antioxidative Aktivität aufweist.
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