So far in our discussion on enzymes, we focus on two types of enzymes. We discuss proteases and carbonic and hydrates. Now we're going to focus on a third type of enzyme found in our body known as nucleotide monophosphate kinases or simply an MP kinases. Now, Nmpkinases catalyze the transfer of a phosphoryl group from some type type of nucleotide triphosphate, for example, ATP molecule onto another molecule, namely the nucleoside monophosphate or NMP. And to basically show what that means, let's take a look at the following general chemical equation. So we have two reactants, two substrate molecules and this reaction is catalyzed by some type of NMP kinase.