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- W151064540 abstract "Cyanide (CN) metabolism by MPST may detoxify CN to its less harmful product thiocyanate (SCN). In addition, MPST displays greater activity than rhodanese in extramitochondrial sites and in other organs which may play an important role in CN's toxicity. A 3% (W/V) homogenate of bovine kidney MPST was prepared. It was assayed using CN and mercaptopyruvate. The buffered (pH 9.5) suspension was incubated for 10 minutes. The reaction was stopped with 38% formaldehyde containing 20% ferric nitrate in nitric acid and measured at 460 nm. Phosphate buffer decreased the apparent rate of conversion of CN to SCN by 90% compared with glycine, borate, or bistris propane buffers. Hypotaurine and propanethiosulfate, but not taurine or thiomallic acid, increased the activity of MPST in a dose-related manner; e.g., hypotaurine, 0.1, 1 and 10 mmole, increased MPST indicates that several compounds increase the rate of formation of SCN from CN and may provide a potential new class of antidotes against the toxicity of CN." @default.
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- W151064540 date "1990-02-26" @default.
- W151064540 modified "2023-09-23" @default.
- W151064540 title "Cyanide conversion to thiocyanate by 3-mercaptopyruvate sulfurtransferase (MPST)" @default.
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