|protein A||medical dictionary|
Protein obtained from Staphylococcus aureus that binds immunoglobulin molecules without interfering with their binding to antigen. Widely used in purification of immunoglobulins and in antigen detection, for example by immunoprecipitation. A very effective B-cell mitogen.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
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