Direct immunoenzyme double staining applicable for monoclonal antibodies

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Abstract
A novel method for immunoenzymatic double staining was developed, using primary antibodies directly labeled with either horseradish peroxidase or alkaline phosphatase. The enzyme-antibody conjugates were applied simultaneously on sections of human tonsil. Intracytoplasmic antigens like immunoglobulins and light chains could easily be detected simultaneously in the same tissue section. With antibodies against cell surface antigens like IgM and T cell antigens areas containing B and T cells could be clearly distinghuished. This method opens the possibility to perform double staining with two monoclonal antibodies.

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