2. Selenium nutrition

3. 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
Muscle protein composition:
Selenoprotein W
Protect cell membranes:
Selenoprotein P

4. Selenium amino-acids
                                                    
Chemical structures of the amino acids, methionine and cysteine, and the comparable seleno-amino acids.
Source: Weiss, 2008