And that allows us to recycle these electrons. So this is the recycling step of this process. And we can imagine that this cytochrome B structure is actually a device that the complex uses to recycle those electrons so that we don't lose those electrons and we can reuse electrons to produce even more reduced cytochrome C molecules. Now, the two cytochrome C molecule or two cytochrome C molecules are actually reduced in a single queue cycle. The first one is reduced as a result of the first half cycle and the second one is produced reduced as a result of that second half cycle. And one thing I didn't mention here is the fact that in the second half cycle, because we want to produce that ubiquinol, two protons are actually uptaken from the matrix of the mitochondria area.