該基因編碼的蛋白質屬于凝血酶敏感蛋白家族。是一種二硫鍵聯的同源三聚體糖蛋白，介導細胞間和細胞間和基質間的相互作用。這種蛋白已被證明是一種有效的腫瘤生長和血管生成抑制劑。對小鼠的研究表明，這種蛋白可能調節間充質細胞的細胞表面特性，并參與細胞粘附和遷移。
The protein encoded by this gene belongs to the thrombospondin family. It is a disulfide-linked homotrimeric glycoprotein that mediates cell-to-cell and cell-to-matrix interactions. This protein has been shown to function as a potent inhibitor of tumor growth and angiogenesis. Studies of the mouse counterpart suggest that this protein may modulate the cell surface properties of mesenchymal cells and be involved in cell adhesion and migration.