Abstract
The interaction of antigen with sensitized lymphocytes produces a protein substance capable of reducing the electrophoretic mobility of guinea-pig peritoneal macrophages. Reaction with the protein slowing factor also involves some vital synthetic activities of the macrophage. A critical number of lymphocytes is required to initiate the complete reaction suggesting that above this threshold recruitment may take place. It is suggested that the mechanism of action is a close parallel to that of macrophage migration inhibition.
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Selected References
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