In the process, we also use those two protons to actually generate two water molecules. And this is basically the summary of these four steps that take place on complex four. So let's take a look at this summary. So essentially, we have a total of four individual reduced cytochrome C molecules that come and interact with complex four. And they interact one by one. So initially, we have two interacting here and then we have two interacting here to give us a total of four cytochrome C reduced molecules so they're oxidized into their oxidized form.