So if we take a look at this diagram we'll see what we mean. So we have one of the ribose units and a second ribose unit on this ribose unit on the second carbon. So this is carbon 1234 and five on this second carbon the hydroxyl group is actually phosphorylated and that's the difference between NADH and NADPH. Now the pentosphosate pathway also has several other important roles. Number two is it actually provides our cells, our body, a way to break down five carbon sugars that we ingest from our diet. So it provides a way to break down pencil sugars obtained from the diet.