So that means we go from a five carbon to a four carbon molecule known as succinctal coenzyme A. Now, the coenzyme A release in step one reacts with this molecule and goes into the process. That's why we have the succinl coenzyme A, and we also once again, reduce an NAD into our NADH. We also release the H plus ion as in step number three. Now let's move on to step number five. In step number five, we basically transfer a phosphate group from the succinil coenzyme A onto the GDP, where GDP is basically guanosine diphosphate, and we form our guanosine triphosphate.