Well, erythropletin is basically a glycoprotein that is produced by special cells found inside our kidneys. And these glycoproteins are released into the blood plasma and they act as hormones. They basically bind on suspension precursor cells and they stimulate the cells to basically produce erythrocytes, red blood cells. Now, the reason we essentially add these sugar molecules onto the protein component is to basically increase the stability of erythropleton within the blood plasma. And this decreases the likelihood that the kidneys are going to remove this hormone from the blood plasma. So glycosylation of Erythropolietin helps to stabilize this structure in the blood plasma.