| Section2 = | Section3 = }} In biochemistry, flavin adenine dinucleotide (FAD)'s a redox cofactor involved in several important reactions in metabolism. FAD can exist in two different redox states and its biochemical role usually involves changing between these two states. Many oxidoreductases, called flavoenzymes or flavoproteins, require FAD as a prosthetic group which functions in electron transfers. FAD's derived from riboflavin (vitamin B2). It consists of a riboflavin group bound to th… (More on Fad)