And when we have high levels of ATP, it blocks the activity of this enzyme and that leads to a build up of isocitrate in the matrix of the mitochondria. Now, isocitrate, if recalled back to the citric acid cycle, can be interconverted into citrate. So it basically converts back and forth. But if we have high levels of isocitrate, we're also going to see an accumulation of citrate molecules and this will promote fatty acid synthesis. So high levels of ATP and high levels of citrate molecules basically stimulates the process of fatty acid synthesis. And that makes sense because we need ATP and we need citrate to actually begin the process of fatty acid synthesis.