SUOX
The SUOX gene provides instructions for making an enzyme called sulfite oxidase, which helps break down protein building blocks (amino acids) that contain sulfur when they are no longer needed. Specifically, sulfite oxidase is involved in the final step of this process, in which sulfur-containing molecules called sulfites are converted to other molecules called sulfates by adding an oxygen atom (a process called oxidation).
The GG-allele is the risk genotype and is associated with a slower conversion of sulfites to sulfates. Sulfites can inhibit tyrosinase, polyphenol oxidase and ascorbate oxidase and this can affect dopamine levels. Sulfites can decrease ATP, deplete glutathione, sensitivity can lead to asthma and low blood sugar.
Sulfite oxidase is inhibited by heavy metals and low molybdenum. Severe B12 deficiency decreases SUOX activity.