Why? Well, because the substrate molecule is a glucose phosphate and this is actually a dehydrogenase reaction. So what happens is we have this NADP plus molecule that will act as an electron acceptor. So we essentially extract two electrons from this particular glucose phosphate and those two electrons are picked up by this molecule. In addition, an H ion is picked up by this molecule as well. And we generate the reduced version of nicotine amide adenine Dinucleotide phosphate.