Acid-catalyzed esterification and biotin/fluorescent labeling of glutathione polysulfides based on stability under heating and pH change
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Glutathione polysulfides GSSSG and GSSSSG are stable in water up to 80 °C and below pH 9. Their carboxyl groups can be efficiently esterified with TMSCl in alcohols, reacting first at glycine, then glutamic acid. The resulting 3-butyne-1-yl esters allow Cu-ca... ...
