So Fumarase catalyze the hydration of fumarate into malate. Note that the water tax only at a specific site from this side and not anywhere else. And so we only form the L isomer of the malate. So this exists in the L isomeric form. And in the final step of the citric acid cycle, we actually want to regenerate the oxyloacetate. And so the malade is oxidized into oxyloacetate by the activity of malade dehydrogenase.