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Hemolytic complement activity of PVG (C+) and PVG (C−) serum. Hemolytic complement activity of serum from PVG (C+) rats was expressed as the CH50 titer, which ranged between 40 and 80 (50% of hemolysis of presensitized sheep RBC). Serum of PVG (C−) rats had no hemolytic complement activity.
