Haptoglobin, belonging to the group of acute phase reactant proteins in the serum, is an acidoglycoprotein, and exhibits genetic polymor-phism by the difference inthe types of light chains it contains. The biosynthesis and degradation of haptoglobin are mainly carried out in the liver and regulated by some cytokines, prostaglandins and hormones. Haptoglobin has multifaceted biological activities, so it is believed that haptoglobin may be an iniportant regulating protein to be present in the serum.