Correlation between the triggering of proliferation and the potentiation of NK activity induced by protein A in human lymphocytes

Various preparations of Staphylococci protein A (SpA) obtained either from strain Cowan-1 or strain A676 and two SpA low molecular fragments (AB and B) were tested for their mitogenic and NK-stimulating activity on human peripheral blood lymphocytes. Though all 4 preparations of SpA and both of its...

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