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  • Title: Large scale purification of intralumenal alkaline phosphatase from calf intestine by immunosorbent affinity chromatography.
    Author: Schwenzer B, Neef B, Bublitz R, Ehle H, Horn A.
    Journal: Biomed Biochim Acta; 1987; 46(1):15-21. PubMed ID: 3107547.
    Abstract:
    Electrophoretically and immunologically homogeneous alkaline phosphatase (AP) can be obtained by a simple and rapid two-step procedure. Step 1: Immunosorbent affinity chromatography using immobilized polyclonal anti-AP-antibodies and elution of the bound enzyme by triethylamine solution, pH 11.4. After affinity chromatography the specific activity of the extracted crude material increases from 3.5 to 793 IU/mg. Step 2: Final purification to a specific activity of 1524 IU/mg by DEAE-cellulose ion exchange chromatography. One investigator is able to purify 100 mg AP within 3 days. The overall recovery is 65%. Methods for characterization and selection of anti-AP-antiserum using immunoinhibition of AP are described.
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