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Selenium nutrition. Selenium - Functions. Composition of amino-acids – seleno -cysteine ( SeCys ) and seleno -methionine ( SeMet ) Enzymatic processes Antioxidants: Glutathione peroxidase and thioredoxin reductase Thyroid hormone activation: Iodothyronine deiodinase
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Selenium - Functions • Composition of amino-acids – seleno-cysteine (SeCys) and seleno-methionine (SeMet) • Enzymatic processes • Antioxidants: Glutathione peroxidase and thioredoxinreductase • Thyroid hormone activation: Iodothyroninedeiodinase • Muscle protein composition: • Selenoprotein W • Protect cell membranes: • Selenoprotein P
Selenium amino-acids Chemicalstructuresoftheaminoacids, methionineandcysteine, andthecomparableseleno-aminoacids. Source: Weiss, 2008