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Lacritin enhances metabolic activity of CRL-11515 cells in a time dependent manner. Cellular metabolic activity following 1 minute, 15 minutes 30 minutes, and 24 hour exposure to 1 nM lacritin shows a biphasic curve, as measured by MTT assay. Data are expressed as a percentage of control. (**P < 0.001, *P < 0.05; n = 4).
