Overview of peroxisome functions in different organisms and tissues. Peroxisomes display a great variety in metabolic pathways as defined by their respective enzymatic content. Most eukaryotes share peroxisomal enzymes for fatty-acyl-CoA metabolism (α- and β-oxidation) and detoxification of hydrogen peroxide by catalase. In addition, several specialized metabolic pathways housed in the peroxisomal matrix of various organisms or tissues are shown.