<prompt> Enzyme that protects the brain from free radical injury is:MyeloperoxidaseSuperoxide dismutaseNADPH oxidaseHydroxylase  <response>: - Superoxidase dismutases SODs are found in many cell types and conve O2 radicals into hydrogen peroxide This group of enzymes includes:- Manganese-SOD localized in mitochondria Copper-zinc- SOD found in the cytosol. - One of the earliest discovered hereditary forms of Amyotrophic lateral sclerosis ALS has mutations in the gene encoding copper-zinc superoxide dismutase SOD1 on chromosome 21; this variant accounts for about 20 of familial cases. 