It contains three disulfide bonds and a total of four possible glycosylation sites. α-Antithrombin is the dominant form of antithrombin found in blood plasma and has an oligosaccharide occupying each of its four glycosylation sites.
On sadrži tri disulfidne veze i četiri moguća mesta glikozilacije. α-Antitrombin je dominantna forma antitrombina nađena u krvnoj plazmi i sadrži oligosaharid u sva četiri mesta glikozilacije.