... oxidised to sulphoxide and finally, to the corresponding sulphone, and tyrosine forms dopaquinone (Tan et al., 1987a). Studies of 2 proteins (bovine serum albumin and casein) and 3 peptides (L-aspartyl-L-phenylalanine, ... chlorine dioxide disinfection byproducts in drinking water. Environ. Sci. Technol. 28: 592-599. Richardson SD (2003) Disinfection by-products and other emerging contaminants in drinking water. ... proteins, peptides and amino acids Proteins, peptides and some amino acids, especially tyrosine, tryptophan and cysteine can undergo oxidation and/ or substitution when exposed to chlorine dioxide...