It uses ATP to essentially create a motion of these microtubules. So it's the Dynam that uses ATP to basically slide across our nine doublet microtubules and that creates a bending like motion for this particular eukaryotic flagellum. So the dynamic motor proteins utilize ATP adenosine triphosphate molecules to force the double microtubules to slide against one another, creating a bending like motion and propelling that cell forward. So we see that there are several important differences between eukaryotic and prokaryotic flagellum. So there are differences in not only structure and composition, but also the source of energy as well as the type of motion that is made by our flagella. So let's look at the following table that basically summarizes the most important differences between prokaryotic and eukaryotic flagella.