And so we form this ribulose five phosphate molecule. So we kick off a carbon dioxide molecule, we form a pentosugar, a five carbon sugar. So we have 123456 carbons here, while we have only 12345 carbons here. And we also form that reducing ancient molecule that can be used by the cell in a variety of different ways. Now, once we form the ribulous phosphate, we have the final reaction taking place that is really an isomerization reaction in which we have the enzyme phosphatentose. Isomerase basically transforms this keto ribulase phosphate into an aldos, the derivose phyphosphate.