So this is the membrane of the er, and this is the lumen of the Er. And so what happens is by using a special membrane protein known as T one, or glucose six phosphate transporter, the glucose six phosphate enters the lumen of the Er. And once inside the lumen of the Er, the glucosex phosphate in the presence of water, because, again, we have plenty of water in the lumen of the Er, it's transformed into glucose and a single inorganic phosphate. So orthophosphate is produced as well. And the enzyme that catalyzes this is actually a membrane bound enzyme known as glucose phosphatase, which is found on the membrane of the Er. On top of that, we also have another protein that essentially assists with this process, known as the calcium binding stabilizing protein.