Separation of human neutrophils in self-generated continuous density gradients of percoll.

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Abstract
Human neutrophils were separated into two fractions using a continuous density gradient of Percoll solution. A marked decrease in O2- production was observed in the low-density neutrophil fraction. There was little erythrocyte contamination in the high-density neutrophil fraction (< 0.5%), and thus the hypotonic or ammonium chloride lysis of erythrocytes was not necessary.