1.4.4.2 2-mercaptoethanol thiol compound required for maximal activity on glycine-CO2 exchange reaction 391989 1.4.4.2 dithiothreitol P and H protein alone jointly catalyze the glycine-CO2 exchange reaction in presence of pyridoxal phosphate and dithiothreitol 391979 1.4.4.2 dithiothreitol thiol compound required for maximal activity on glycine-CO2 exchange reaction 391989 1.4.4.2 GSH thiol compound required for maximal activity on glycine-CO2 exchange reaction 391989 1.4.4.2 H-protein upon addition of exogenous unlipoylated H-protein, kcat increases 190fold, in the absence of the lipoic acid moiety on H-protein, the methylamine adduct with pyridoxal 5'-phosphate (aminomethyl-quinonoid intermediate) is released as the product of the GLDC-catalyzed decarboxylation of glycine 741906 1.4.4.2 lipoylated H-protein the presence of the lipoyl moiety on H-protein does not affect the rates of GLDC (or GLDCcoexp)-catalyzed glycine decarboxylation 741906 1.4.4.2 additional information the presence of the lipoyl moiety on H-protein does not affect the rates of GLDC (or GLDCcoexp)-catalyzed glycine decarboxylation further corroborates the suggestion that H-protein (or lipoylated H-protein) does not directly participate in and is not required for release of CO2 from glycine in the formation of the pyridoxal 5'-phosphate-quinonoid intermediate, an important distinction that is contrary to earlier findings 741906