Role of selenocystein is important in -
Hydroxylation of dopamine
Oxidation of drugs
Antioxidant mechanism
None of the above
Ans. is 'c' i.e., Antioxidant mechanism o Selenocysteine is considered to 21st standard amino acid.o It is present at the active site of many enzymesGlutathione peroxidase - An antioxidant enzyme.Deiodinase - Converts T4 to T3iii) Thioredoxin reductase.Glycine reductase.Formate dehydrogenaseo Selenocysteine has a structure similar in cystein, but containing selenium in place of sulfur atom of cysteine,o Proteins that contain selenocystein residues are called selenoproteins.
Amino Acid Metabolism