A glycosyl group is a structure obtained by removing the hydroxy group from the hemiacetal function of a monosaccharide and, by extension, of a lower oligosaccharide.
Glycosylated Hemoglobin is used primarily to identify the plasma glucose concentration over time.
A buildup of glycosylated hemoglobin within the red cell reflects the average level of glucose to which the cell has been exposed during its life cycle.
Measuring glycosylated hemoglobin assesses the effectiveness of therapy by monitoring long-term serum glucose regulation.