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The respiratory burst of neutrophils measured by enhanced luminolchemiluminescence. Neutrophils isolated from blood (triangle) and milk (circle) of normal lactating goats were incubated with 1 mM luminol and 1.5 mM CuSO4 in the absence (resting, open) and presence (stimulated, closed) of 1 μM PMA for 30 min. Data are the means from 3 goats. Vertical bars represent ± sχ̄
