In the immunization process of rabbits with the protein fraction of the water-salt extract from human brain partially and concentrated at 500-600 times was received antiserum revealed brain specific alpha 2-globulin that is not identical to the known cytoplasmatic brain specific antigens. This antigen has got electrophoretic mobility of alpha 2-globulins, molecular weight 90 +/- 10 kD and isoelectric point 4.1-5.4. Develop the procedure for purification of this antigen on the basis of the combination ion change, affinity, hydrophobic chromatography gel-filtration and isochromatofocusing.
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