cysteine molecular structure unveiling the nonessential amino acids role in protein synthesis antioxidant defense and

cysteine amino acid protein metabolism antioxidant reducing agent radical scavenger detoxification liver kidney glutathione enzyme cofactor inhibitor activator biochemistry molecular biology genetics nutrition physiology medicine supplement bioavailable absorption peptide synthesis cellular protection disease prevention metabolic pathways chemical structure bond formation model research clinical trial study laboratory test diagnosis treatment human health science organic chemistry compounds functional food use nutritional healthy diet biological processes medical scientific benefits