So let's begin by focusing on the first step, the oxidation of flavin oxidation by flavin adenine dinucleotide. So we begin with our fatty acid in the acyl coenzyme A form. So this is the activated form of the fatty acid and an enzyme known as acyl coenzyme adhdrogenase basically catalyzes the formation of a double bond between carbon two, the alpha carbon, and carbon three, the beta carbon. So remember that this is the alpha carbon and this is the beta carbon. And so we're forming a double bond of pi bond between the alpha and the beta carbon. In the process, we essentially oxidize this fatty acid chain.