Flavoprotein oxidases are enzymes that contain a flavin group, which is a type of cofactor derived from vitamin B2 (riboflavin). These enzymes play a crucial role in various biological processes by catalyzing the oxidation of substrates, often using molecular oxygen as an electron acceptor. They are involved in metabolic pathways, including the breakdown of fatty acids and the detoxification of harmful substances. These oxidases are found in many organisms, including bacteria, plants, and animals. They contribute to cellular respiration and energy production by facilitating the transfer of electrons. Flavoprotein oxidases are also important in industrial applications, such as in the production of biofuels and pharmaceuticals.