Why dehydrogenase? Well, remember, a dehydrogenase is an enzyme that basically abstracts those electrons attached onto the H ion to basically form that reduced NADH molecule. So in this particular case, in the same exact way that we have a two step process here, we also have a two step process here. And in the first step of step three, we take the isocytrade and we reacted with the nicotine amide adenine dinucleotide in the oxidized form. And so in this process, the NAD plus is actually reduced into the NADH, and the isocitrate molecule is oxidized to form the oxylosuxanate. And we also release this H plus ion.