THBG Polyclonal Antibody

disease:Defects in SERPINA7 are a cause of TBG deficiency [MIM:314200]. Mutations in the SERPINA7 gene can result as a whole spectrum of deficiencies, characterized by either reduced or increased TBG levels in the serum. Patients show, respectively, reduced or elevated protein-bound iodine but are euthyroid.,function:Major thyroid hormone transport protein in serum.,polymorphism:Two qualitative TBG variants occur in particular populations. TBG-A is found in 40% of Australian aborigines, it has reduced affinity for thyroxine and triiodothyroxine and increased susceptibility to inactivation by heat or acid. TBG-S ('s' for slow shift on isoelectic focusing) is found in blacks, Eskimos, Melanesians, Polynesians and Indonesians, but not in Caucasians; TBG-S is slightly more thermolabile.,similarity:Belongs to the serpin family.,tissue specificity:Expressed by the liver and secreted in plasma.,