Secretion of TNFα in pg/mL from purified human NK cells from an individual donor exposed to tributyltin for 24h, 48 h, and 6 days. NK cells were exposed to concentrations of TBT of 0, 2.5,5, 10, 25, 50, 100, and 200 nM for 24 h, 48, h or 6 days. Data are the secretion of TNFα in pg/mL from the cells of an individual donor. Each sample was tested in triplicate (n=3). Values are mean±S.D at each concentration for each length of incubation.