特異性:reacts with beta2-microglobulin (b2M) associated with cell-surfaceMHC Class I molecules and other membrane antigens as well as with solublebeta2-microglobulin. b2M is a 12 kDa Ig like glycoprotein expressed on lymphocytes,thymocytes, monocytes, granulocytes, platelets, endothelial cells and epithelial cells. It isabsent on erythrocytes.