A new screening test for C3 nephritis factor based on a stable cell bound convertase on sheep erythrocytes

C3 nephritis factor (C3nef) activity was measured by the incubation of sheep erythrocytes with a mixture of normal human serum and patient's serum in EGTA followed by lysis of the washed cells with rat C in EDTA. The C convertase activity on the cells was dependent on the dose of patient's...

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