Peroxidase catalyzed reactions of iodide at low pH |
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| Authors: | G S Bayse M Morrison |
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| Institution: | Laboratories of Biochemistry, St. Jude Children''s Research Hospital, Memphis, Tennessee 38101 USA |
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| Abstract: | Lactoperoxidase (LP) and horseradish peroxidase (HRP) catalyze the rapid oxidation of iodide to iodine at pH 3.6. One mole of peroxide reacts with 2 moles of iodide, producing 1 mole of iodine. Neither enzyme catalyzes the further oxidation of iodine. The turnover numbers for LP and HRP are 1.4 × 105 and 2.2 × 104 I2 moles produced/min/enzyme mole, respectively. |
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