[Comparative immunologic and physico-chemical properties of neurospecific antigens--bull antigen D and rat antigen alpha].

Immunological and physicochemical properties were compared for water-soluble acid neurospecific antigens: D of the bull and alpha of the rat. During immunoelectrophoresis in agar gel antigen D migrates as two immunologically indentical fractions having a position of prealbumins and alpha-globulins of blood serum. Antigen D from the bull brain is incompletely immunologically identical with antigen alpha from the rat brain. The molecular weight of antigen D determined under conditions of Sephadex G-100 column gel chromatography is 73000.