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Dose response of LPS-induced TNF-α production from stimulated MM6 cells. MM6 cells (106/ml) were incubated with 0.1 to 500 ng of LPS per ml, and TNF-α production was measured by an ELISA. The TNF-α produced was proportional to the LPS concentration up to an LPS dose of 500 ng/ml. Bars represent the mean (+ standard error) of four separate experiments.
