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Effect of zinc on alternative pathway activation in human serum. Human serum was made 0, 100, 250, 500, 750, 1000, 2000, 3000, 4000, and 5000 μm in zinc. Radial diffusion activity assays were performed and normalized to 0 μm. The experiment was performed in triplicate, and the means ± S.E. of each measurement are shown.
