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- W2000781511 abstract "Conditions were sought to increase the yield of HCN from l-histidine incubated with l-amino acid oxidase (l-amino acid:oxygen oxidoreductase (deaminating), EC 1.4.3.2) from snake venom, and horseradish peroxidase (donor:hydrogen-peroxide oxidoreductase, EC 1.11.1.7). Small amounts of histidine and high buffer concentrations favored high HCN yields, which reached a maximum of 72%. Imidazole 4-aldehyde and imidazole 4-carboxylic acid were identified among the reaction products, together with CO2, NH3, H2O2 and imidazole acetic acid. The CO2 formed was equal to the histidine oxidized, and to the sum of NH3 plus HCN formed. The production of HCN was associated with an increased O2 uptake, which was established from the beginning of the reaction, with no apparent lag and ranged from 1.2 to 1.6 μmol extra O2 taken up/μmol HCN formed. The system was inhibited by catalase, but added superoxide dismutase caused a small stimulation of both HCN production and O2 consumption, and a larger stimulation of H2O2 accumulation. Added hydroxylamine was cooxidized to nitrite in an amount equimolar with the HCN formed. This nitrite formation was inhibited by superoxide dismutase. The facts could be interpreted in terms of superoxide anion formation during the HCN-producing reaction." @default.
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- W2000781511 date "1980-01-01" @default.
- W2000781511 modified "2023-10-14" @default.
- W2000781511 title "The formation of hydrogen cyanide from histidine in the presence of amino acid oxidase and peroxidase" @default.
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- W2000781511 doi "https://doi.org/10.1016/0005-2744(80)90037-6" @default.
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