further studies using two-dimensional sds-page , immunodiffusion and immunoaffinity chromatography demonstrated that the pas-positive glycoproteins are not derived directly from serum because they are electrophoretically and antigenically distinct from serum proteins , including alpha 1-glycoprotein , alpha 2-hs-glycoprotein , and alpha 1-antitrypsin .
C0017968
glycoproteins
C0051477
alpha 2-hs-glycoprotein