Higerd TB, Virella G, Cardenas R, Koistinen J, Fett JW. New method for obtaining IgA-specific protease.
J Immunol Methods 1977;
18:245-9. [PMID:
591723 DOI:
10.1016/0022-1759(77)90178-8]
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Abstract
A simple method for obtaining an active preparation of IgA-specific protease from a bacterial source is presented. In this method Streptococcus sanguis was inoculated onto the surface of a dialysis membrane on nutrient agar. Following growth, the membrane was removed from the agar surface and washed in a small volume of buffer. A solution with protease activity against IgA1 monoclonal proteins was obtained by clarification of the wash and appeared to be similar to enzyme preparations obtained by other methods.
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