Well, for instance, fatty acid biosynthesis, nucleotide biosynthesis, cholesterol, bisynthesis, neurotransmitter biosynthesis, as well as many different types of detoxification processes as we'll discuss in future lectures. Now, what's the difference between NADH and NADPH in terms of their structure? Well, the only difference is if we examine the second carbon hydroxyl group on one of the ribose units on the NADPH molecule it will be phosphorylated and in the case of NADH it is not phosphorylated. 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.