SUOX (Sulfite Oxidase): SUOX encodes an enzyme essential for the metabolism of sulfur-containing amino acids. It catalyzes the final step in breaking down cysteine and methionine by converting sulfite into sulfate, which is then excreted in the urine. Proper SUOX activity prevents sulfite buildup, which can cause neurological damage and physical abnormalities known as sulfite oxidase deficiency, underscoring the enzyme’s critical role in amino acid metabolism and neurotoxicity prevention.